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Journal articles on the topic 'Aerial photography in road surveying'
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Bryn, Mikhail Y., and Dinara R. Bashirova. "COMPARATIVE EVALUATION EFFICIENCY OF MOBILE LASER SCANNING AND AERIAL SURVEYING FROM UNMANNED AERIAL VEHICLES FOR ROAD SURVEY." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 26, no. 3 (2021): 20–27. http://dx.doi.org/10.33764/2411-1759-2021-26-3-20-27.
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The application of mobile laser scanning and aerial photography from unmanned aerial vehicles for shooting highways is considered. The aim of the research was to compare the results of shooting using mobile laser scanning systems and aerial photography from an unmanned aerial vehicle to de-termine the preferred option for shooting a highway. The experimental part of the research was carried out using the following equipment: scanning was performed using the Topcon IP - S2 Compact sys-tem, aerial photography was carried out from the GEOSCAN 201 unmanned aerial vehicle. Based on the comparative tests performed on the section of the A - 121 "Sortavala" highway, a comparative analysis of the data obtained for various indicators was carried out: the speed of the shooting stages, the cost of a set of equipment, the cost of shooting, and the accuracy of the results was evaluated. Practical recommendations for the application of these methods are given, their advantages and disad-vantages are indicated.
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BRYN, Mikhail Ya, Dinara R. BASHIROVA, and Artur G. BAGISHYAN. "Comparative evaluation of mobile laser scanning, aerial photography from an unmanned aircraft system and surveying from an integrated road laboratory when performing diagnostics of highways." Proceedings of Petersburg Transport University 2021, no. 2 (June 2021): 211–21. http://dx.doi.org/10.20295/1815-588x-2021-2-211-221.
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Objective: To compare the possibilities of using mobile laser scanning (MLS) and aerial photography (AFS) from an unmanned aircraft system (UAS) and to make a survey from an integrated road laboratory when performing diagnostics of highways. Methods: For the analysis, a section of the regional road in the Kursk region was selected, on which the survey was carried out using considered methods. The main characteristics were identified when performing the diagnostics, their values were obtained on the basis of data from the integrated road laboratory, aerial photography with UAS, as well as ILS, and the accuracy of the results obtained, the compliance of the data with the requirements of regulatory documents were assessed. Results: Based on the work performed, the following conclusions were made: the determination of identified diagnostic parameters by the methods of ILS and APS with UAS is correct and aerial photography with UAS at the cost of equipment, the cost of shooting is the most profitable when drawing up topographic road plans. It is noted that in terms of accuracy, the APS method meets the requirements for plans at a scale of 1:500, MLS – 1:1000. Practical importance: Not all indicators required for diagnostics can be obtained with APS with ALS and MLS, since they require specialized equipment and direct interaction with the road surface, however, the range of application of the selected methods can be significantly expanded. Adhesion coefficient is measured using an integrated mobile road laboratory, so it is not advisable to abandon it. It was noted that the equipment of the laboratory, depending on the cost, may be different
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Kazachenko, Ludmila, Vladyslav Kazachenko, and Tetyana Zhidkova. "GEODESY, CARTOGRAPHY AND AERIAL PHOTOGRAPHY." GEODESY, CARTOGRAPHY AND AERIAL PHOTOGRAPHY 94, 2021, no. 94 (December 28, 2021): 29–34. http://dx.doi.org/10.23939/istcgcap2021.94.029.
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The development of exogenous processes on the Earth's surface is a large-scale problem. Due to the development of exogenous processes there are changes in the composition and structure of the earth's crust and its surface. The destruction of streets, houses and public buildings, roads and railways leads to enormous losses. To predict the development of soil degradation, erosion processes on agricultural lands, which lose annual production areas, leads to the formation of a ravine-beam system and reduces the productive amount of land owned by citizens – is a solution. The use of GIS technologies, remote sensing of the Earth and modern programming can partially solve the problem, as it is a rapid identification of areas that have undergone the process of soil degradation and possible prediction of the development of negative phenomena. The use of geodetic software, GIS, information layers of the Public cadastral map can help in the fastest finding of territories, development of the forecast of the further destructive action, development of the corresponding protective methods and their introduction. The areas with manifestations of exogenous processes - soil degradation in agricultural enterprises, where every year the area of highly fertile chernozems is lost, which leads to large losses and landslides in the forest-steppe and steppe settlements of Kharkiv region have been subject of our study. We investigated destructive processes by geodetic measurements in the territories of their manifestations, observations were carried out for 8 years. The development of exogenous processes on the Earth's surface was revealed, which was manifested in landslides in the settlements of the forest-steppe zone and degradation of agricultural lands in the steppe and forest-steppe part of Kharkiv region. The cause of the destruction of the earth's surface were factors independent of human activity. We built 3-D models of development of exogenous processes manifested in soil erosion and growth of the ravine-beam system and determined the degree of erosion after surveying and processing the results of geodetic measurements in the software Digitals. For 8 years, we made changes to the software, surveying the area and building a monitoring line. Also in the settlements on the territory of the two zones, we observed the development of landslides on the streets of the village. Milova and s. Nova Vasylivka, where there is an intensive development of exogenous processes. The use of GIS technologies and remote sensing of the Earth to monitor the development of exogenous processes simplifies the solution.
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Sugianto, Andy. "UAV and site investigation for evaluation of landslide hazard: a case study in Cipularang Km.92 Toll Road." MATEC Web of Conferences 229 (2018): 04015. http://dx.doi.org/10.1051/matecconf/201822904015.
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Application of Unmanned Aerial Vehicles (UAV) or drones to detect landslide Hazard and risk assessment becomes uncommon methodology in Indonesia. Nowadays, in Indonesia drones are still popular to use for commercial, news interest and advertisement purposes only. It is not mainly used for detecting landslide hazard or risk assessment purposes. Furthermore, the landslide in Indonesia is a common worldwide phenomenon that often occur and can have a great impact on the infrastructures and sometimes tragically result in fatalities. UAV provide a quick, safe, effective, and potentially superior means of inspecting large-scale, remote and difficult to access landforms with significant cost benefits compared to traditional inspection method by manual tracking. UAV can derive the aerial photography which represents actual condition and landslide hazard instantly. By using an aerial photograph, it can simplify the engineer to obtain viewpoint and presumption related with the mechanism of the landslide, some factors triggering the landslide (terrain and topography, drainage, river stream, logged area, slope height, structure, and community, etc). The result suggests that UAC can be one of most effective value in surveying and large-scale inspection to determine landslide hazard as well as general site condition.
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Park, Chan Hyeok, Kyoung Ah Choi, and Im Pyeong Lee. "Analysis of Applicability of Land-based MMS Surveying and Aerial Photography Mapping for Precise Road Maps." Journal of Korean Society for Geospatial Information System 26, no. 1 (March 31, 2018): 37–47. http://dx.doi.org/10.7319/kogsis.2018.26.1.037.
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Fuldain González, Juan, and Félix Varón Hernández. "NDVI Identification and Survey of a Roman Road in the Northern Spanish Province of Álava." Remote Sensing 11, no. 6 (March 26, 2019): 725. http://dx.doi.org/10.3390/rs11060725.
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The Iter 34 (Antonine Itinerary XXXIV) is the name of the Roman road that crosses the province of Álava from west to east. Since no specific path was officially recognized before our study, the remains of the road did not benefit from heritage protection. In 2017, we made a project to determine the course of the road through rural Álava. In addition to traditional archaeological excavation and prospecting techniques, we used UAVs (unmanned aerial vehicle) to produce NDVI (normalized difference vegetation index) orthomosaic plans of ten cultivated areas through which the road is conjectured to pass. NDVI orthomosaics let us see crop marks better than with conventional photography, allowing us to detect the crop marks during times of the year and in places where conventional photography would fail to show them. Thanks to the NDVI orthomosaics, remains of the road were identified not only in places where we knew it existed, but also in previously unknown locations. Furthermore, other archaeological features were identified close to the roadway. This technique heralds a great advance in non-invasive methods of archaeological surveying. By using precision farming techniques we have identified the course of the Roman road Iter 34 in several locations in a short period of time and with few resources.
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Qtiashat, Deya, Zeyad Makhmreh, Hala Abu Taleb, and Ahmed Khlaifat. "Urban Land Use Pattern and Road Network Characteristics Using GIS in Al Salt City, Jordan." Modern Applied Science 12, no. 4 (March 30, 2018): 128. http://dx.doi.org/10.5539/mas.v12n4p128.
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The aim of this study is to analyze the land use pattern and roads network in relation to the population density and distribution. The GIS analysis tools was used to investigate and describe the characteristics of land use pattern. method by utilizing the methods of surveying and spatial statistical analysis, and studying the areas’ topography; which includes the optimal land use and assessment through aerial photography that determines the future urban development besides determining the role played by the roads network within the study area. The study show that the residential use is dominant in the study area with 77.19 %. The study also showed that the urban growth was random and accompanied by the increase demand on the use of land for residential purpose. The study recommended paying more attention to the agricultural activities in Al Salt city and establishing a commercial organization that attracts visitors from the capital city of Amman who would like to get out of the city busy life but still stay near the capital city of Amman.
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Rylskiy, Ilya, Tatiana Nokelaynen, Tatiana Kotova, and Alexandr Panin. "Calculation of vegetation passability categories for vehicles based on laser scanning data." InterCarto. InterGIS 28, no. 1 (2022): 314–24. http://dx.doi.org/10.35595/2414-9179-2022-1-28-314-324.
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Determining the categories of vegetation passability for vehicles (in forested areas) is a very popular and technically difficult task. Its complexity increases as the area of the territory increases, while duration of works and their cost should decrease. The passability of forests is influenced by elementary characteristics such as the species composition, the diameter of the trunks, the average distance between the trunks, etc. An example of such work is the construction of vegetation passability maps for vehicles by category. This task is in high demand during the construction of new facilities (pipelines, roads, railways) and the development of new deposits in the forest zone. One of the most promising methods of information support for solving this problem is airborne laser scanning and digital aerial photography. The disadvantage of this method (as well as all methods of remote sensing) is the practical impossibility of direct instrumental measurement of a number of vegetation parameters (despite 25 years of progress in the development of the lidar method), such as the diameter of the trunk, or its exact location. Increasing scan density, combined with the use of UAVs surveying at high angles to the vertical, allows these characteristics to be obtained at the cost of a significant decrease in productivity, an exponential increase in the cost of surveying and data processing, with little confidence in the obtained vegetation characteristics. This paper proposes an alternative approach based on the identification of relationships between characteristics that can be directly measured from low-density laser scanning data (crown height, coverage density, range of distribution of points of laser reflections in height relative to the ground) and vegetation passability categories measured in the field conditions. The obtained results show high reliability. A positive feature of this approach is the low cost and high productivity in determining the categories of terrain passability.
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ROMANOVSKYI, A., and O. LISNYK. "Application of BIM in bridge construction." Modern achievements of geodesic science and industry 2, no. 44 (September 1, 2022): 49–52. http://dx.doi.org/10.33841/1819-1339-2-44-49-52.
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The spread of digital technologies in the field of engineering led to the invention of various methods for digitization processes. The use of Building Information Model (BIM) is already expanding to the application for infrastructure objects. Therefore, a need for the practical implementation of a BIM for each type of the specific objects is sufficient. In the current research, the main objective is to present an optimal technique for the application of BIM for built bridges. Based on the project documentation and field measurements of a bridge, a digital model must be created using Revit software. To investigate the achievements so far, some scientific articles and proposed technologies have been analyzed. How is BIM for infrastructure management already developed in many countries? What is a more detailed methodology called bridge information model (BrIM)? Another important question is how to digitize old objects in a simple and fast way. The procedures of data acquisition, georeferencing and modeling have been implemented and described. All successive steps from surveying an area to visualization and data transfer are presented in the study. The TLS and aerial photographs were merged and transferred into a point cloud, which served as a source for modeling. Revit software is used to create a bridge. Attribute data was taken from the project documentation, and the model of the newly built bridge on the old federal road B96 was transferred to a BIM. For the bridge on the new federal road B96, the inclination of the bridge body and the rotation around the center axis were modeled using an add-on for Revit called SOFiSTiK.
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Fraser, R. H., I. Olthof, M. Maloley, R. Fernandes, C. Prevost, and J. van der Sluijs. "UAV PHOTOGRAMMETRY FOR MAPPING AND MONITORING OF NORTHERN PERMAFROST LANDSCAPES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-1/W4 (August 27, 2015): 361. http://dx.doi.org/10.5194/isprsarchives-xl-1-w4-361-2015.
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Northern environments are changing in response to recent climate warming, resource development, and natural disturbances. The Arctic climate has warmed by 2–3°C since the 1950’s, causing a range of cryospheric changes including declines in sea ice extent, snow cover duration, and glacier mass, and warming permafrost. The terrestrial Arctic has also undergone significant temperature-driven changes in the form of increased thermokarst, larger tundra fires, and enhanced shrub growth. Monitoring these changes to inform land managers and decision makers is challenging due to the vast spatial extents involved and difficult access. <br><br> Environmental monitoring in Canada’s North is often based on local-scale measurements derived from aerial reconnaissance and photography, and ecological, hydrologic, and geologic sampling and surveying. Satellite remote sensing can provide a complementary tool for more spatially comprehensive monitoring but at coarser spatial resolutions. Satellite remote sensing has been used to map Arctic landscape changes related to vegetation productivity, lake expansion and drainage, glacier retreat, thermokarst, and wildfire activity. However, a current limitation with existing satellite-based techniques is the measurement gap between field measurements and high resolution satellite imagery. Bridging this gap is important for scaling up field measurements to landscape levels, and validating and calibrating satellite-based analyses. This gap can be filled to a certain extent using helicopter or fixed-wing aerial surveys, but at a cost that is often prohibitive. <br><br> Unmanned aerial vehicle (UAV) technology has only recently progressed to the point where it can provide an inexpensive and efficient means of capturing imagery at this middle scale of measurement with detail that is adequate to interpret Arctic vegetation (i.e. 1–5 cm) and coverage that can be directly related to satellite imagery (1–10 km<sup>2</sup>). Unlike satellite measurements, UAVs permit frequent surveys (e.g. for monitoring vegetation phenology, fires, and hydrology), are not constrained by repeat cycle or cloud cover, can be rapidly deployed following a significant event, and are better suited than manned aircraft for mapping small areas. UAVs are becoming more common for agriculture, law enforcement, and marketing, but their use in the Arctic is still rare and represents untapped technology for northern mapping, monitoring, and environmental research. <br><br> We are conducting surveys over a range of sensitive or changing northern landscapes using a variety of UAV multicopter platforms and small sensors. Survey targets include retrogressive thaw slumps, tundra shrub vegetation, recently burned vegetation, road infrastructure, and snow. Working with scientific partners involved in northern monitoring programs (NWT CIMP, CHARS, NASA ABOVE, NRCan-GSC) we are investigating the advantages, challenges, and best practices for acquiring high resolution imagery from multicopters to create detailed orthomosaics and co-registered 3D terrain models. Colour and multispectral orthomosaics are being integrated with field measurements and satellite imagery to conduct spatial scaling of environmental parameters. Highly detailed digital terrain models derived using structure from motion (SfM) photogrammetry are being applied to measure thaw slump morphology and change, snow depth, tundra vegetation structure, and surface condition of road infrastructure. <br><br> These surveys and monitoring applications demonstrate that UAV-based photogrammetry is poised to make a rapid contribution to a wide range of northern monitoring and research applications.
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Dovhopoliuk, Liudmyla, Serhiy Ignatov, and Natalia Neizvestna. "MODERN PROGRAMS FOR PROCESSING DATA OF GEODESIC DIMENSIONS." AUTOMOBILE ROADS AND ROAD CONSTRUCTION, no. 111 (June 30, 2022): 99–105. http://dx.doi.org/10.33744/0365-8171-2022-111-099-105.
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Modern software used for processing field geodetic surveys was studied. Every year, geodetic production faces new tasks that require a quick and correct solution. The modern level of automation of geodetic work is characterized by the widespread distribution of electronic total stations and satellite receivers, digital aerial photography complexes, field portable computers, as well as multifunctional software packages. This requires the use of new technologies and an automated information processing system, which includes the availability of a software complex for processing field measurement materials, means of automated data entry and graphical information, programs for processing graphics and automated drawing, devices for outputting graphic and textual information. The software for processing the received data of geodetic measurements should be such that the most complex tasks are performed, and at the same time it is easy to use. The development of software tools for processing geodetic measurements will help to reduce the time for camera data processing. The article evaluates the software in terms of the possibility of their practical implementation in the field of geodesy, as well as in terms of accessibility, comprehensibility and the presence of additional functions. An analysis of the functionality of the most widespread in Ukraine modern software complexes for processing the results of ground surveying, such as: CADdy, FieldWorks, Topograd, Topocad, and CREDO, designed for processing the results of geodetic measurements and designing the construction, reconstruction, repair of highways and transport interchanges, was carried out. including public roads, city streets and roads of all technical categories. Based on the analysis of the functionality of modern software complexes designed to process the results of geodetic measurements and the design, reconstruction and capital repair of highways, appropriate conclusions were formed.
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Liao, Yijun, and Richard L. Wood. "Discrete and Distributed Error Assessment of UAS-SfM Point Clouds of Roadways." Infrastructures 5, no. 10 (October 18, 2020): 87. http://dx.doi.org/10.3390/infrastructures5100087.
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Perishable surveying, mapping, and post-disaster damage data typically require efficient and rapid field collection techniques. Such datasets permit highly detailed site investigation and characterization of civil infrastructure systems. One of the more common methods to collect, preserve, and reconstruct three-dimensional scenes digitally, is the use of an unpiloted aerial system (UAS), commonly known as a drone. Onboard photographic payloads permit scene reconstruction via structure-from-motion (SfM); however, such approaches often require direct site access and survey points for accurate and verified results, which may limit its efficiency. In this paper, the impact of the number and distribution of ground control points within a UAS SfM point cloud is evaluated in terms of error. This study is primarily motivated by the need to understand how the accuracy would vary if site access is not possible or limited. In this paper, the focus is on two remote sensing case studies, including a 0.75 by 0.50-km region of interest that contains a bridge structure, paved and gravel roadways, vegetation with a moderate elevation range of 24 m, and a low-volume gravel road of 1.0 km in length with a modest elevation range of 9 m, which represent two different site geometries. While other studies have focused primarily on the accuracy at discrete locations via checkpoints, this study examines the distributed errors throughout the region of interest via complementary light detection and ranging (lidar) datasets collected at the same time. Moreover, the international roughness index (IRI), a professional roadway surface standard, is quantified to demonstrate the impact of errors on roadway quality parameters. Via quantification and comparison of the differences, guidance is provided on the optimal number of ground control points required for a time-efficient remote UAS survey.
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Smekalova, Tatyana, Edgar Terekhin, Alexei Pasumanskiy, and Fedor Lisetskii. "Using of historical cartography, remote sensing data and GIS for studying of land division system of Taurian Chersonesos." InterCarto. InterGIS 26, no. 4 (2020): 177–87. http://dx.doi.org/10.35595/2414-9179-2020-4-26-177-187.
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The article presents the results of work on the use of historical cartography data, German captured aerial photographs of Luftwaffe 1941–1944, a satellite image of 1966 and geographic information systems (GIS) for a detailed reconstruction and identification of the basic principles of the ancient land division system of the ancient chora (rural area) of Tauric Chersonesos in Crimea. Based on the integrated GIS, it was possible to reconstruct an ancient grid of 4- and 6-hecatogygos blocks linked to the terrain, separated by roads. The creation of plans for intra-unit land surveying was carried out on the basis of the analysis of multi-temporal aerial and satellite imagery in the ArcGIS geographic information environment. It was carried out by creating and further processing a group of vector layers, the main of which included a grid of roads, the rest — dividing blocks into plots and single hector modules. The analysis in the GIS of the mutual arrangement of the elements of this grid made it possible to determine the sequence of development and delimitation of the territory of the Heraclean Peninsula in the 4th century BC. The study of the internal surveying of blocks by mosaic of aerial photographs of 1941–1944, integrated into the GIS, made it possible to trace the dynamics of changes in the 3rd century BC of internal division of blocs from individual civil plots (hectators) to large land holdings, sometimes reaching and even exceeding the size of the whole block. As a result of a comprehensive study using historical cartography, archival aerial photographs of the 1940s and a satellite image of 1966, collected in a single geographic information system, it was possible to determine the basic principles and identify the modules of the Taurian Chersonesos land surveying: a single civil plots (hecatogygos) and a unit of measurement of areas (aroura).
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Cai, Z., W. Liu, G. Luo, and Z. Xiang. "STUDY ON PRACTICAL TECHNOLOGIES OF AERIAL TRIANGULATION FOR REAL SCENE 3D MOELING WITH OBLIQUE PHOTOGRAPHY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3 (April 30, 2018): 119–21. http://dx.doi.org/10.5194/isprs-archives-xlii-3-119-2018.
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The key technologies in the real scene 3D modeling of oblique photography mainly include the data acquisition of oblique photography, layout and surveying of photo control points, oblique camera calibration, aerial triangulation, dense matching of multi-angle image, building of triangulation irregular network (TIN) and TIN simplification and automatic texture mapping, among which aerial triangulation is the core and the results of aerial triangulation directly affect the later model effect and the corresponding data accuracy. Starting from this point of view, this paper aims to study the practical technologies of aerial triangulation for real scene 3D modeling with oblique photography and finally proposes a technical method of aerial triangulation with oblique photography which can be put into practice.
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Kuznetsov, Evgeniy, Galina Koretskaia, and Asmelash Abay. "Comparative Analysis of Aerial Photography with Instrumental Survey." E3S Web of Conferences 174 (2020): 01031. http://dx.doi.org/10.1051/e3sconf/202017401031.
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At present, in Kuzbass, various methods of automation of plane surveys in open mining are used. In most cases, the choice of method depends on the material base of the enterprise and the professionalism of the performers. Typically, the work on the surveying automation consists in using electronic tachometers, which reduce time and simplify field and office work. However, the use of electronic tachometers remains the human factor and does not allow solving the problem of displaying the situation throughout the open pit at one physical moment of time. Aerial photography (AP) significantly increases the performance of plane surveys and makes it possible to most fully and reliably display the information about the surface and ensure the safety of fieldwork. The article presents a comparative analysis of the accuracy of constructing a digital terrain model obtained during aerial photography by AN-2 aircraft and instrumental survey performed with electronic tachometer Leica TS 06 plus, by example of surveying a trench of section № 1 at Olzherassky open pit in the Kemerovo region. The advantages and disadvantages of AP from an airplane and prospects of using AP from an unmanned aerial vehicle (UAV) are given.
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Fletcher, Reginald S., Allan T. Showler, and Paul A. Funk. "Surveying Thermally-defoliated Cotton Plots with Color-infrared Aerial Photography." Crop Management 6, no. 1 (2007): 1–6. http://dx.doi.org/10.1094/cm-2007-0625-01-rs.
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Sukonnikov, Oleg G., Vladimir N. Gulin, and Nadezhda I. Chirkina. "Aerial photography with UAV for modeling road structures." SAPR i GIS avtomobilnykh dorog, no. 1(12) (March 25, 2019): 40–44. http://dx.doi.org/10.17273/cadgis.2019.1.7.
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Julge, Kalev, Artu Ellmann, and Romet Köök. "Unmanned Aerial Vehicle Surveying For Monitoring Road Construction Earthworks." Baltic Journal of Road and Bridge Engineering 14, no. 1 (March 28, 2019): 1–17. http://dx.doi.org/10.7250/bjrbe.2019-14.430.
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Unmanned aerial vehicle photogrammetry is a surveying technique that enables generating point clouds, 3D surface models and orthophoto mosaics. These are based on photos captured with a camera placed on an unmanned aerial vehicle. Within the framework of this research, unmanned aerial vehicle photogrammetry surveys were carried out over a sand and gravel embankment with the aim of assessing the vertical accuracy of the derived surface models. Flight altitudes, ground control points and cameras were varied, and the impact of various factors on the results was monitored. In addition, the traditional real-time-kinematic Global Navigation Satellite System surveys were conducted for verifications. Surface models acquired by different methods were used to calculate volumes and compare the results with requirements set by Estonian Road Administration. It was found that with proper measuring techniques an accuracy of 5.7 cm for the heights were achieved.
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Hlotov, Volodymyr, Alla Hunina, Ihor Kolb, Vadim Kolesnichenko, and Ihor Trevoho. "THE STUDY OF THE “CETUS” UNMANNED AERIAL VEHICLE FOR TOPOGRAPHIC AERIAL SURVEYING." Geodesy and cartography 47, no. 2 (August 16, 2021): 96–103. http://dx.doi.org/10.3846/gac.2021.12120.
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The work aims to analyze and study the possibilities of using “Cetus” unmanned aerial vehicle (UAV) for performing topographic aerial surveys. The authors developed and tested aircraft-type UAV for topographic aerial photography. The studies were conducted on a specialized landfill, at which there is an appropriate number of situational points whose coordinates are determined with high accuracy. These points were used as both reference and control points. The obtained UAV aerial survey materials were subjected to a phototriangulation process to determine the orientation elements and to analyze, first and foremost, the angular orientation elements. The surveying was carried out on a mountainous territory, where the spatial coordinates of 37 situational points were determined by the method of ground-based GPS survey with an average accuracy of up to 0.05 m. These points were used as reference and control points. Aerial photography was performed in such a way that the scale of the images was as uniform as possible. The design solutions implemented in the Cetus UAV provide all the possibilities to perform aerial surveys of territories in strict compliance with the projected flight parameters. UAV equipment provides the necessary real-time correction of the position of the aerial camera. At the same time the optimum straightness of routes, stability of scales and mutual overlapping of pictures is reached. Regarding the accuracy of obtaining the spatial coordinates of the points of terrain objects, using “Cetus” UAV surveys, plans can even be made on a scale of even 1: 1000. As a result of the creation of the UAV “Cetus”, it became possible to perform the topographic aerial survey of the territories and to create large-scale orthophotos that fully meet the instructions. As a result of testing the “Cetus” UAV, it can be used in production processes when drawing up topographic plans for a large-scale series: 1: 1000 – 1: 5000, which will significantly save the cost of performing topographic work.
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Pisetskaya, Olga, Yanina Isayeva, and Maksim Goutsaki. "Application of Unmanned Flying Vehicle for Obtaining Digital Orthofotomaps." Baltic Surveying 11 (November 20, 2019): 60–69. http://dx.doi.org/10.22616/j.balticsurveying.2019.018.
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Nowadays, surveys using unmanned aerial vehicles is becoming popular. The resulting orthophotomap is the final product for creating digital plans and cardboard. The objectives of the study are to study the possibilities of obtaining orthophotomaps from survey materials using unmanned aerial vehicles based on the results of the experiment. The article describes various types of aerial photography. Some types of unmanned flying vehicles to conduct aerial photography for the purpose of monitoring, engineering surveys, inventory of agricultural land, and crop forecasts are considered. A description of aerial photography surveying is given on the example of the city of Dzerzhinsk, Minsk Region, which is performed taking into account the unmanned flying vehicles of GeoScan 201 and the Republican agricultural aero-geodesic unitary enterprise BelPSHAGI. A description of the GeoScan Planner software and basic pre-flight preparation is given. The stages of the preparatory work before the aerial photography, the creation of the planning and high-altitude geodetic justification, the implementation of aerial photography procedures, the steps of the aerial photograph anchorage procedure are considered. Agisoft Photoscan, which allows to get clouds of points, surfaces, 3D models and orthophotomaps using digital raster images are presented. The map of heights (DEM) of the terrain and the orthophotomap was made on the basis of a dense points cloud. According to the results of the research, a conclusion was made on the possibility of using aerial photography materials obtained using unmanned flying vehicles to get orthophotomaps of the required accuracy.
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Grigorenko, N. I., and E. E. Yanchuk. "DIAGNOSTICS OF THE ROAD CONDITION USING AN UNMANNED AERIAL VEHICLE." World of Transport and Transportation 15, no. 3 (June 28, 2017): 86–92. http://dx.doi.org/10.30932/1992-3252-2017-15-3-7.
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[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT With increasing requirements for durability, reliability and safety of roads and their infrastructure, tools to control technical conditions of roads are being improved, involving operation of unmanned aerial vehicles that help to monitor the road infrastructure with the help of aerial photography. The authors of the article introduce a method of continuous automated monitoring developed by them, which is implemented in Moscow region. The wide functional capabilities of the UAV are confirmed for a number of diagnostic and technological tasks. Keywords: automobile road, geotechnical monitoring, diagnostics of roadway, infrastructure, geomass, unmanned aerial vehicle, aerial photography.
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Zheng, Quan. "Method of Cadastral Mapping in Local Town Cadastral Survey." Journal of Sustainable Urbanization, Planning and Progress 5, no. 1 (December 15, 2020): 45. http://dx.doi.org/10.26789/asu.2020.01.002.
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This paper mainly focuses on the in-depth study of cadastral survey methods in urban cadastral survey, and puts forward some cadastral survey methods, such as above-mentioned technology, global positioning technology, geographic information system, aerial photography surveying and mapping technology, digital surveying and mapping technology, etc., to ensure the convenience and rationality of the application of cadastral surveying and mapping methods, to continuously improve the level of urban cadastral survey, and to ensure the smooth completion of urban cadastral survey.
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Jianming, Chen. "Map of the Mount Gongga Glacier: A Combination of Terrestrial and Aerial Photogrammetry." Annals of Glaciology 8 (1986): 34–36. http://dx.doi.org/10.3189/s0260305500001099.
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For use in glaciological research, between 1982 and 1984, we succeeded in surveying and mapping the Mount Gongga Glacier, on a scale of 1:25 000, by means of a combination of terrestrial and aerial photogrammetry. This paper describes the method in detail.In the survey area, we set up an independent, triangulation network, with microwave distance measurement, and two, independent, straight-line traverses, for basic control. Control points were observed by intersection. The terrestrial, photogrammetric baselines were projected and corrected into distances on the. plane of the map.Terrestrial photography accounted for the majority of the photographs of the survey area. Surveying and mapping of planimetrie and topographic features were completed on a stereo-autograph, using plates mainly from terrestrial photogrammetry. Where these data were insufficient, they were supplemented by aerial photography, plotted on a photographic plotting instrument. Orientation points of the aerial photographs were established by terrestrial, photogrammetric analysis and located on the map by an optical, mechanical method.The practical result showed that a combination of terrestrial and aerial photogrammetry, in mapping a high, mountain, glacier area, on a large scale, is more feasible and flexible than other methods and more economical as well.
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Jianming, Chen. "Map of the Mount Gongga Glacier: A Combination of Terrestrial and Aerial Photogrammetry." Annals of Glaciology 8 (1986): 34–36. http://dx.doi.org/10.1017/s0260305500001099.
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For use in glaciological research, between 1982 and 1984, we succeeded in surveying and mapping the Mount Gongga Glacier, on a scale of 1:25 000, by means of a combination of terrestrial and aerial photogrammetry. This paper describes the method in detail. In the survey area, we set up an independent, triangulation network, with microwave distance measurement, and two, independent, straight-line traverses, for basic control. Control points were observed by intersection. The terrestrial, photogrammetric baselines were projected and corrected into distances on the. plane of the map. Terrestrial photography accounted for the majority of the photographs of the survey area. Surveying and mapping of planimetrie and topographic features were completed on a stereo-autograph, using plates mainly from terrestrial photogrammetry. Where these data were insufficient, they were supplemented by aerial photography, plotted on a photographic plotting instrument. Orientation points of the aerial photographs were established by terrestrial, photogrammetric analysis and located on the map by an optical, mechanical method. The practical result showed that a combination of terrestrial and aerial photogrammetry, in mapping a high, mountain, glacier area, on a large scale, is more feasible and flexible than other methods and more economical as well.
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Thompson, Scott, Graham Thompson, Jessica Sackmann, Julia Spark, and Tristan Brown. "Using high-definition aerial photography to search in 3D for malleefowl mounds is a cost-effective alternative to ground searches." Pacific Conservation Biology 21, no. 3 (2015): 208. http://dx.doi.org/10.1071/pc14919.
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The threatened malleefowl (Leipoa ocellata) constructs a large (often >3 m) incubator mound (nest) that is considered a useful proxy for surveying its presence and abundance in the context of an environmental impact assessment. Here we report on the effectiveness and relative cost of using high-definition aerial photography to search in 3D for malleefowl mounds by comparing results to those of earlier ground-based searches. High-definition colour aerial photography was taken of an area of ~7014 ha and searched in 3D for malleefowl mounds. All 24 active (i.e. in use) malleefowl mounds known before the examination of aerial photography were detected using the new assessment technique. Of the 108 total mounds (active and inactive) known from earlier on-ground surveys, 94 (87%) were recorded using the new technique. Mounds not detected were all old and weathered, many barely above ground level and some with vegetation growing in the crater. Approximately 6.3% of the identifications considered ‘confident’ and ~35.0% considered ‘potential’ based on the aerial photography proved to be false positives. The cost of detecting malleefowl mounds using the interpretation of high-definition 3D colour aerial photography and then subsequently examining these areas on the ground is appreciably cheaper than on-ground grid searches.
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Kadnichanskiy, S. A., M. V. Kurkov, V. M. Kurkov, and Aleksandr Chibunichev. "Certification testing hardware-and-software complex based on unmanned aerial vehicle “Geoscan 401”." Geodesy and Cartography 957, no. 3 (April 20, 2020): 32–38. http://dx.doi.org/10.22389/0016-7126-2020-957-3-32-38.
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The authors present the results of certification testing software-and-hardware complex on the basis of an unmanned aircraft (UAV) “Geoskan 401”, designed for aerial mapping. The substantiation of the need to assess the accuracy characteristics of the photogrammetric processing aerial photos results from the UAV is given. The composition of the complex, the parameters of the test site and the performed aerial photography are given, the order and method of testing are described. Assessment of the aerial triangulation accuracy, creation of a digital elevation model, digital orthophotos and coordinates of marked and unmarked characteristic points (natural contours) of land boundaries and building contours were carried out to confirm the compliance with the requirements of regulatory documents for the implementation of photogrammetric processing, maintenance of the state real estate cadastre and surveying. The values of the spatial data accuracy obtained with the help of a hardware-and-software complex confirm the possibility of using the “Geoskan 401” in real estate cadastre and surveying. Recommendations on the use of hardware and software complex for cadastral and mine surveying works are given.
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Galayda, Andrii, Borys Chetverikov, and Ihor Kolb. "GEODESY, CARTOGRAPHY AND AERIAL PHOTOGRAPHY." GEODESY, CARTOGRAPHY AND AERIAL PHOTOGRAPHY 95,2022, no. 95 (June 28, 2022): 65–76. http://dx.doi.org/10.23939/istcgcap2022.95.065.
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The aim of the work is to propose a method of creating a geographic information online resource for the management of Lisovohrynivetska UTC. To implement the tasks, a technological scheme was proposed, which consisted of 9 stages of work. The first stage involved the collection and analysis of disparate data in both vector and raster formats on the territory of the Lisovohrenivetska united territorial community. In the second stage, with the help of Global Mapper software, all vector data files in *.dxf and *.dmf formats, which were previously available, were converted to *.shp format for further processing in ArcGIS software. As a result of the conversion, graphic and attributive data were obtained in the required format and according to the layers they contain, the geodatabase with symbols according to the classifier was edited to create 1: 2000 scale plans. The next step was to unify the database of convertible files, as vector data was created with different construction of attribute tables. In addition, there is a need to enter vector data into the edited geospatial database. To do this, a ArcPy script was written that rearranges attribute tables and enters data into a geodatabase. Adjusted and populated the attribute database of vector objects for those columns where there was no information. The penultimate step was to develop the structure of the geoportal on the basis of ArcGIS-online to download the geodatabase to Lisovohrynivetska UTC on the server, to enable their external use with a unique login and password. The last step, after creating the structure of the geoportal, was to upload vector and raster geodata prepared by ArcGIS to the geoportal. As a result of the realization of the set purpose the technique of creating the geoinformation online resource for the management of the united territorial community is offered and described. During the implementation of the method the data of 24 disparate vector layers for the Lisogrynivtska community of Khmelnytsky region were processed and converted. Raster cartographic materials for UTC were collected and processed. The geodatabase according to the classifier for scale 1: 2000 is created. The structure of the geoportal based on the ArcGIS-online kernel with a connected map-base based on the online resource GoogleMaps, where all processed materials are downloaded, has been developed. The scientific novelty is to develop the concept of accumulation of heterogeneous vector and raster geospatial data in one geodatabase, by converting them into a specific format. Additional modules have been written in ArcPy to unify the database structure. Implemented geoinformation system is located on the geoportal and is designed for management decisions of community leaders. In addition, the created GIS can be used for land management and surveying work on community sites.
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DOROSH, Olha, Yevhen BUTENKO, Hryhorii KOLISNYK, Andriy DOROSH, and Iryna KUPRIIANCHYK. "THE USE OF UAVS: DEVELOPMENT, PERSPECTIVES AND APPLICATION." AgroLife Scientific Journal 10, no. 2 (December 31, 2021): 63–71. http://dx.doi.org/10.17930/agl202127.
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The article explores some aspects of the use of unmanned aerial vehicles (UAVs), approaches to their classification and possible areas of application. The main advantages and disadvantages of using unmanned aerial vehicles of different types (quadcopter and aircraft type) in comparison with classical aerial photography and ground shooting are revealed. The features of UAV aerial photography at different stages of semi-automatic mode are considered. Aerial photography of a local object (land with vegetation and the building of the NULES of Ukraine building) was performed by a quadcopter with the subsequent acquisition of an orthophoto, a digital model, construction of a 3D image and a further topographic plan of scale 1:500. Surveying materials were proceeded with a specialized Pix4D program. We counted the time needed to perform separate stages of material processing. In this case, all stages of processing were performed in automatic mode, except for entering coordinates of anchor points. The main disadvantage of this program was the need to form a 3D model in manual mode without the possibility of phased saving. The article offers a classification of the main problems of using UAVs, namely: regulatory, technical and scientific. The comparative assessment of the use of technologies of tacheometric survey, terrestrial scanning, lidar and aerial photography with UAV and their use for land cover monitoring purposes was made.
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Dragomir, Lucian Octavian, Roxana Claudia Herbei, and Mihai Valentin Herbei. "The use of modern technologies in the surveying field." MATEC Web of Conferences 342 (2021): 02016. http://dx.doi.org/10.1051/matecconf/202134202016.
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In order to achieve or complete the 1: 1.000 scale situation plan and the digital terrain model for the Timişoara - Sibiu highway section, and given the difficult access conditions in the project area, it was decided to use photogrammetric techniques for extraction of spatial information needed for mapping. In order to achieve the mapping requirements at a scale of 1: 1.000, the following activities were performed: Realization of the geodetic support network; Realization of the aerial photography project; Making pre-marking points in areas without clear details or other location possibilities; Simultaneous aerial photography of sub-blocks at different flight heights to ensure a 12 cm pixel and simultaneous laser scanning with LiDAR system; Identification of marking and pre-marking points on the subblock frames; Performing GPS measurements to determine the coordinates of landmarks and photogrammetric pre-marking; LIDAR data processing using permanent GPS stations to obtain coordinates in the ETRS89 system and transform them into the STEREO70 system and Black Sea reference plan 75; Calibration of LIDAR data; Filtering LIDAR data; Realization of aerotriangulation on subblocks or bands; Stereo restitution of planimetric and altimetric details for 1: 1.000 scale (3D mode); Transforming 3D plans into 2D plans; Editing and elaborating topographic plans.
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Pacina, Jan. "Geodetic surveying as part of archaeological research in Sudan." Geoinformatics FCE CTU 14, no. 1 (June 27, 2015): 47–64. http://dx.doi.org/10.14311/gi.14.1.4.
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<p>Surveying is an important part of any archaeological research. In this paper we focus on the archaeological research in north Sudan (6<sup>th</sup> Nile cataract) and the surveying methods applicable under the local conditions. Surveying in the Third World countries is affected by the political situation (limited import of surveying tools), local conditions (lack of fixed points, GNSS correction signal), inaccessible basemaps and fixed point network. This article describes the methods and results obtained during the three archaeological seasons (2011-2014). The classical surveying methods were combined with KAP (Kite Aerial Photography) to obtain the desired results in form of archaeological maps, detailed orthophoto images and other analyses results.</p>
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Shukina, Olga, Azizjon Ruziev, and Mansur Ergashev. "Use of UAV Geoscan 201 for surveying a linear object of the Khiva–Urgench highway." InterCarto. InterGIS 28, no. 1 (2022): 430–40. http://dx.doi.org/10.35595/2414-9179-2022-1-28-430-440.
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The aim of this work is to perform a linear aerial survey of the Khiva–Urgench highway using the Geoscan 210 UAV, the results of which will create orthophotomaps at a scale of 1:1 000, which are necessary for designing bicycle and sidewalk paths along this route. Surveyors of the Applied Geodesy Department of UZGASHKLITI performed a field planned-altitude reference at this object. 48 control points were determined. Characteristic solid contours along the route were chosen as reference points. The binding of control points was carried out from the starting points of the State Geodetic Networks, using satellite receivers (SN 5242498595, 5243499034, 4827155394) in the RTK mode in a radial way, by the calibration method on the ground. The coverage area was 17.4 sq. km. Aerial photography was carried out at a height of 211 m by a Geoscan 201 unmanned aerial vehicle at a scale of 1:500 with a DSC RXIR digital camera with a focal length of 35 mm. Forward overlap of aerial photographs was 70 %, and lateral—50 %. 4 aerial routes were made at this facility, the photography basis was 42 m. The number of aerial photographs at the facility was 3 868 pieces, and the coverage of aerial photography was 300 m. The images and their EXIF files were georeferenced by performing field processing using the Geoscan Planner program. Before the start of field work, the GNSS receiver (Trimble R6) was installed at a known point on the ground and started in static mode (10 Hz). The aircraft has a GNSS receiver (Topcon) operating in fast static mode (10 Hz). The GNSS data on the ground and on board the aircraft are balanced. Image center coordinates are calculated from the base station GNSS receiver data using MAGNET Tools software. Then the data is imported into Agisoft Metashape software for automatic processing. In this case, the coordinates of the image centers were recalculated from the WGS-84 system into the SK-42 (Pulkovo 1942) system adopted in our country. The process of optimization and alignment of aerial photographs was carried out. After that, in order to obtain a high image quality, the orthophoto map was built using a height map built on the basis of a dense point cloud. The result of the work performed are orthophoto maps for the Khiva–Urgench highway, which will be used to design the location of bicycle and sidewalk paths.
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Brecher, H. H. "Surface Velocity Determination on Large Polar Glaciers by Aerial Photogrammetry." Annals of Glaciology 8 (1986): 22–26. http://dx.doi.org/10.3189/s0260305500001063.
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Aerial photogrammetric block triangulation, a standard and well-developed technique for extending accurate control for mapping into the interior of a region from a few points of known position on its perimeter, can be readily adapted to determine surface velocities on bodies of ice which are too large, and often too crevassed, to be studied effectively by conventional ground surveying. Velocities are calculated from the changes in positions of the same natural surface features determined from photography of two (or more) epochs and the elapsed time. This method is capable of providing many uniformly-spaced measurements over the whole, moving, ice surface, thus allowing the production of maps of velocity and strain-rate, which are valuable in analyzing the ice-flow regime. Results from measurements completed some years ago on Byrd Glacier, one of the largest outlet glaciers from the East Antarctic plateau, are presented as an example of what the method can yield. By means of Doppler satellite surveying, relative positions of control points for each photography epoch can be determined with sub-meter accuracy, making the technique suitable also in regions where no fixed land features exist. A brief description of a project under way in such an area, on Ice Stream B in West Antarctica, is given.
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Brecher, H. H. "Surface Velocity Determination on Large Polar Glaciers by Aerial Photogrammetry." Annals of Glaciology 8 (1986): 22–26. http://dx.doi.org/10.1017/s0260305500001063.
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Aerial photogrammetric block triangulation, a standard and well-developed technique for extending accurate control for mapping into the interior of a region from a few points of known position on its perimeter, can be readily adapted to determine surface velocities on bodies of ice which are too large, and often too crevassed, to be studied effectively by conventional ground surveying. Velocities are calculated from the changes in positions of the same natural surface features determined from photography of two (or more) epochs and the elapsed time. This method is capable of providing many uniformly-spaced measurements over the whole, moving, ice surface, thus allowing the production of maps of velocity and strain-rate, which are valuable in analyzing the ice-flow regime. Results from measurements completed some years ago on Byrd Glacier, one of the largest outlet glaciers from the East Antarctic plateau, are presented as an example of what the method can yield. By means of Doppler satellite surveying, relative positions of control points for each photography epoch can be determined with sub-meter accuracy, making the technique suitable also in regions where no fixed land features exist. A brief description of a project under way in such an area, on Ice Stream B in West Antarctica, is given.
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Rada, Artem, Svetlana Kononova, Angela Yushkovskaya, and Aleksandr Kuznetsov. "Economic efficiency estimation of unmanned aircraft application for aerial photography." E3S Web of Conferences 291 (2021): 04005. http://dx.doi.org/10.1051/e3sconf/202129104005.
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The use of unmanned aerial vehicles (hereinafter referred to as “UAV”) is one of the most popular ways of collecting objective spatial data on the land plots under survey. The main advantages of UAVs include the significantly lower cost of surveying, design and complex cadastral works compared to traditional methods of determining coordinates (e.g. performing a tacheometric survey and plane-table survey). The designed sector of block No. 9 in the Yurga urban district of Kemerovo region with cadastral No. 42:36:0102001 (land category: residential), comprising 22 apartment buildings, is taken as an example. The economic performance of land plots marking, carried out with cadastral accuracy, based on data obtained using UAVs and without the use thereof, is assessed.
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Dorozhynskyy, O. L. ,., I. Z. Kolb, L. V. Babiy, and L. V. Dychko. "GEODESY, CARTOGRAPHY AND AERIAL PHOTOGRAPHY." GEODESY, CARTOGRAPHY AND AERIAL PHOTOGRAPHY 92,2020, no. 92 (December 24, 2020): 15–23. http://dx.doi.org/10.23939/istcgcap2020.92.015.
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Aim. Determination of the elements of external spatial orientation of the surveying systems at the moment of image acquisition is the fundamental task in photogrammetry. Principally, this problem is solving in two ways. The first way is direct positioning and measuring of directions of camera optical axis in the geodetic space with the help of GNSS/INS equipment. The second way is the analytical solution of the problem using a set of reference information (often such information is a set of ground control points whose geodetic positions are known with sufficient accuracy and which are reliably recognised on aerial images of the photogrammetric block). The authors consider the task of providing reference and control information using the second approach, which has a number of advantages in terms of reliability and accuracy of determining the unknown image exterior orientation parameters. It is proposed to obtain additional images of ground control points by the method of their auxiliary aerial photography using an unmanned aerial vehicle (UAV) on a larger scale compared to the scale of the images of the photogrammetric block. The aim of the presented work is the implementation of the method of creating reference points and experimental confirmation of its effectiveness for photogrammetric processing. Methods and results. For the entire realization of the potential of the analytical way to determine the elements of external orientation of images, it is necessary to have a certain number of ground control points (GCP) and to keep the defined scheme of their location on the photogrammetric block. As the main source of input data authors use UAV aerial images of the terrain, which are obtained separately from the block of aerial survey, and have a better geometric resolution and which clearly depict the control reference points. Application of such auxiliary images gives the possibility of automated transferring of the position of ground control point into images of the main photogrammetric block. In our interpretation, these images of ground control points and their surroundings on the ground are called "control reference images". The basis of the work is to develop a method for obtaining the auxiliary control reference images and transferring of position of GCP depicted on them into aerial or space images of terrain by means of computer stereo matching. To achieve this goal, we have developed a processing method for the creation of control reference images of aerial image or a series of auxiliary multi-scale aerial images obtained by a drone from different heights above the reference point. The operator identifies and measures the GCP once on the auxiliary aerial image of the highest resolution. Then there is an automatic stereo matching of the control reference image in the whole series of auxiliary images in succession with a decrease in the resolution and, ultimately, directly with the aerial images of photogrammetric block. On this stage there are no recognition/cursor targeting by the human operator, and therefore there are no discrepancies, errors or mistakes related to it. In addition, if to apply fairly large size of control reference images, the proposed method can be used on a low-texture terrain, and therefore deal in many cases without the physical marking of points measured by GNSS method. And this is a way to simplify and reduce the cost of photogrammetric technology. The action of the developed method has been verified experimentally to provide the control reference information of the block of archival aerial images of the low-texture terrain. The results of the experimental approbation of the proposed method give grounds to assert that the method makes it possible to perform geodetic reference of photogrammetric projects more efficiently due to the refusal of the physical marking of the area before aerial survey. The proposed method can also be used to obtain the information for checking the quality of photogrammetric survey for provision of check points. The authors argue that the use of additional equipment - UAV of semi-professional class to obtain control reference images is economically feasible. Scientific novelty and practical relevance. The results of approbation of the "control reference image" method with obtaining stereo pairs of aerial images with vertical placement of the base are presented for the first time. There was implemented the study of the properties of such stereo pairs of aerial images to obtain images of reference points. The effectiveness of including reference images in the main block of the digital aerial triangulation network created on UAV’s images is shown.
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AOYAMA, Yukio. "Case Examples of Drone Aerial Photography and Laser Surveying at the Construction Site." Journal of Environmental Conservation Engineering 48, no. 3 (May 20, 2019): 131–35. http://dx.doi.org/10.5956/jriet.48.3_131.
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Li, Zhenzhe. "Road Aerial Object Detection Based on Improved YOLOv5." Journal of Physics: Conference Series 2171, no. 1 (January 1, 2022): 012039. http://dx.doi.org/10.1088/1742-6596/2171/1/012039.
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Abstract In this paper, the target detection technology based on deep learning is applied to the process of object detection in highway aerial photography. By detecting road objects such as vehicles or crosswalk, it lays the foundation for digitalization and informationization of roads. Firstly, the unmanned aerial vehicle is used to collect road images. Then based on YOLOv5 network, aiming at the problem of small detection target, attention mechanism is introduced to weigh different channels of feature graph, and SoftPool is introduced in SPP module to improve pooling operation and retain more detailed feature information. The experimental results show that the improved YOLOv5 network can identify and locate objects on aerial roads more accurately and effectively.
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Kurkov, V. M., T. N. Skripitsina, and A. Yu Sozonova. "METHODS AND TECHNOLOGIES FOR AERIAL SURVEYING AND GROUND PHOTOGRAMMETRIC SURVEYS FOR ARCHAEOLOGICAL PURPOSES." ECOLOGY ECONOMY INFORMATICS. GEOINFORMATION TECHNOLOGIES AND SPACE MONITORING 2, no. 5 (2020): 75–82. http://dx.doi.org/10.23885/2500-123x-2020-2-5-75-82.
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This article we consider methods and technologies of unmanned aerial surveying and close-range photogrammetric survey as applied for archeological research. We summed up the practical experience of the specialists of the Moscow State University of Geodesy and Cartography (MIIGAiK), obtained with the participation in the Bosporus archaeological expedition of the State Historical Museum on the Taman Peninsula in 2018–20. During the 3 expeditions, 18 archaeological sites were surveyed by aerial methods using UAV Geoscan 101 Geodesy and UAS DJI Phantom 4 Pro. In addition to aerial surveying, the Canon 30D digital camera with 50 mm and 14 mm focal lengths was used for groundbased, close-range photogrammetric surveys of archaeological sites. Some sites were surveyed many times during different periods of archaeological research. At all surveyed archaeological sites using photogrammetric processing methods at the Agisoft Metashape software we received survey documents (orthophoto, digital terrain models, 3D models). For some artifacts, three-dimensional metric models have been obtained using digital photogrammetry methods. Various methods of aerial surveying were used to study archaeological sites. The article gives recommendations on optimization of photography process in order to obtain reliable and informative documents for archaeological excavations. Comparison and analysis of aerial and close-range survey data was performed by the QGIS geographic information system. The information obtained using geo-information technologies will improve the quality and reliability of forecasts and hypotheses in archaeological studies.
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Gao, W., G. Wang, H. Li, W. Mao, S. Yin, and B. Yao. "RESEARCH ON THE KEY TECHNOLOGY OF UAV IN THE ACCURACY ASSESSMENT OF LAND COVER CLASSIFICATION." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2022 (May 31, 2022): 1203–8. http://dx.doi.org/10.5194/isprs-archives-xliii-b3-2022-1203-2022.
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Abstract. This paper uses UAV low-altitude aerial photography technology, equipped with orthophoto camera, tilt camera and LiDAR camera, to obtain and process high-precision evaluation data, which is used to evaluate the correctness of land cover classification. Through the design of aerial photography scheme and data collection and processing, the rapidly acquired digital orthophoto, oblique 3D model data and laser LiDAR form a complete set of technical processes, which can relatively accurately and objectively monitor the quality of surface data for the existing geographical conditions. situation is assessed. The main purpose of this study is to further enrich the technical means of quality inspection of surveying and mapping products, to improve the technical level of quality inspection and acceptance of geographic condition monitoring data, and to improve the accuracy and reliability of data quality evaluation.
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Choi, Tae Seok, Ha Su Yoon, Yun Soo Choi, Won Jong Lee, and Soo Young Chang. "A Study on High Definition Road Map Construction Using Aerial Photography." Journal of Korean Society for Geospatial Information Science 28, no. 3 (September 30, 2020): 69–76. http://dx.doi.org/10.7319/kogsis.2020.28.3.069.
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Wang, Z., H. Wu, J. Zhu, R. Zhang, H. Song, J. Wang, and Z. He. "CAPACITY BUILDING FOR GEO-INFORMATION DRIVEN EMERGENCY RESPONSE IN CHINA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W8 (August 23, 2019): 447–53. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w8-447-2019.
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<p><strong>Abstract.</strong> Surveying and mapping technologies played a significant role in former emergency response activities. Despite remarkable progress on emergency surveying and mapping has been achieved in China, there are still some limits to meet the quick and smart response requirements. Aiming to fill the gaps, Chinese government has proposed a capacity building project for geo-information driven emergency response. In this paper, the business process and data flow of emergency surveying and mapping are analysed firstly. Then, the major design of this project is introduced through 4 parts. These are capacity of UAV aerial photography, capacity of field surveying, capacity of smart service and capacity of data integration. Finally, the preliminary progress and prospective achievement are discussed. The implementation of this project could be an example for comprehensive application of advanced surveying and mapping technologies, and could also be a basis to improve our national emergency response framework.</p>
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Carvajal, F., F. Agüera, and M. Pérez. "SURVEYING A LANDSLIDE IN A ROAD EMBANKMENT USING UNMANNED AERIAL VEHICLE PHOTOGRAMMETRY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XXXVIII-1/C22 (September 6, 2012): 201–6. http://dx.doi.org/10.5194/isprsarchives-xxxviii-1-c22-201-2011.
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Tian, Z., M. Li, L. Lv, and J. Zhou. "RESEARCH ON KEY POINTS OF QUALITY INSPECTION OF AERIAL PHOTOGRAMMETRY RESULTS AND QUALITY IMPROVEMENT MEASURES." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B4-2021 (June 30, 2021): 141–46. http://dx.doi.org/10.5194/isprs-archives-xliii-b4-2021-141-2021.
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Abstract. With the development of surveying and mapping geographic information technology, digital aerial photogrammetry technology has been widely developed and applied. Based on the research on the applicability of existing quality inspection standards, this paper has completed the analysis of the key points of the quality inspection of surveying and mapping aerial photography results on the current technological development level, and combined with the quality inspection work of related projects for many years, selecting 15 real cases in the industry from the technology, it completed the analysis of common quality problems in four aspects: flight quality, data quality, image quality, and accessory quality, and put forward relevant quality evaluation standards and suggestions for improving production quality. The research content of the article can provide a reference for the production and quality inspection of corresponding projects in the later period, and provide a basis for industry supervision and promote the improvement of the overall quality level of the industry.
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Vallet, B., and J. P. Papelard. "ROAD ORTHOPHOTO/DTM GENERATION FROM MOBILE LASER SCANNING." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences II-3/W5 (August 20, 2015): 377–84. http://dx.doi.org/10.5194/isprsannals-ii-3-w5-377-2015.
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This paper proposes a pipeline to produce road orthophoto and DTM from Mobile Laser Scanning (MLS). For the ortho, modern laser scanners provide a reflectance information allowing for high quality grayscale images, at a much finer resolution than aerial photography can offer. For DTM, MLS offers a much higher accuracy and density than aerial products. This increased precision and resolution leverages new applications for both ortho and DEM. The first task is to filter ground vs non ground, then an interpolation is conducted to build image tiles from the filtered points. Finally, multiple layers are registered and blended to allow for seamless fusion. Our proposed approach achieves high quality products and scaling up is demonstrated.
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Yang, X., B. Qiu, and Z. Tian. "RESEARCH ON THE APPLICATION METHOD OF HISTORICAL BUILDING PROTECTION UNDER THE INTEGRATION OF MULTIPLE TECHNOLOGIES." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B2-2022 (May 30, 2022): 923–28. http://dx.doi.org/10.5194/isprs-archives-xliii-b2-2022-923-2022.
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Abstract. With the development of society, the protection of historical buildings has been paid more and more attention. In recent years, China has increased the surveying and mapping of historical buildings buildings. This paper takes the historical building protection project in Zhejiang Province, China as an example. This paper introduces the method of combining UAV aerial photography, 3D laser scanning, close close-range photogrammetry and traditional surveying and mapping techniques. Mapping and information collection of historical buildings. And on this basis, the content and methods of quality inspection of historical architectural achievements are introduced. Guarantee the reliability of historical building archives and data quality quality. This will play a supporting role in the future repair and maintenance of historical buildings buildings.
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Warner, William S., Sjur Andersen, and Steiner Saeland. "Surveying a Waste Site with 35-mm Oblique Aerial Photography: Monoplotting with a Digitizing Tablet." Cartography and Geographic Information Systems 20, no. 4 (January 1993): 237–43. http://dx.doi.org/10.1559/152304093782637505.
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Gao, Z., Y. Song, C. Li, F. Zeng, and F. Wang. "RESEARCH ON THE APPLICATION OF RAPID SURVEYING AND MAPPING FOR LARGE SCARE TOPOGRAPHIC MAP BY UAV AERIAL PHOTOGRAPHY SYSTEM." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W6 (August 23, 2017): 121–25. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w6-121-2017.
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Rapid acquisition and processing method of large scale topographic map data, which relies on the Unmanned Aerial Vehicle (UAV) low-altitude aerial photogrammetry system, is studied in this paper, elaborating the main work flow. Key technologies of UAV photograph mapping is also studied, developing a rapid mapping system based on electronic plate mapping system, thus changing the traditional mapping mode and greatly improving the efficiency of the mapping. Production test and achievement precision evaluation of Digital Orth photo Map (DOM), Digital Line Graphic (DLG) and other digital production were carried out combined with the city basic topographic map update project, which provides a new techniques for large scale rapid surveying and has obvious technical advantage and good application prospect.
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Altyntsev, M. A. "Integration of mobile laser scanning and aerial imagery data for generating digital surface models." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 27, no. 5 (2022): 5–18. http://dx.doi.org/10.33764/2411-1759-2022-27-5-5-18.
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Aerial photography and mobile laser scanning are some of the most efficient methods of surveying, which allow creating digital surface models of the area with high accuracy and detail. Both of these methods allow gathering information about the area in the form of point clouds. However, due to the fact that the aerial survey data are obtained from the air, and the MLS ones from the ground, point clouds obtained by different methods display the same territory with different detail. For example, the roofs of buildings are well recognized from aerial data, and their walls – from MLS ones. The necessity of combined use of heterogeneous data through their integration is appeared. In this case, it is necessary to solve a number of tasks, such as registration of point clouds, assessing visibility zones depending on the survey territory, saving in the final combined point cloud only those points in the over-lapping areas that most accurately and fully describe the shapes of the terrain objects, filtering false measurements. The main tasks that arise during data integration are discussed. The technique of integrating mobile laser scanning and aerial photography data for generating a single digital surface model is proposed. This technique consists in recognizing the separated objects of the territory or their parts. The study results of the developed technique based on the data of Novosibirsk are presented.
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Altyntsev, M. A. "Mobile laser scanning data registration using aerial photography results based on computing relative position of point clouds." Vestnik SSUGT (Siberian State University of Geosystems and Technologies) 27, no. 4 (2022): 5–15. http://dx.doi.org/10.33764/2411-1759-2022-27-4-5-15.
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One of the most rapid surveying methods of terrestrial survey is mobile laser scanning (MLS). This method allows collecting data for objects of the environment with high detail and accuracy in a short period of time. A condition for obtaining accurate MLS data is receiving a satellite signal of high quality. When scanning built-up urban areas, the quality of signal deteriorates, which leads to a decrease in accuracy. The use of additional control data, one of which may be aerial photography results, helps to compensate for the loss of accuracy. For this purpose, MLS data are registered using aerial photog-raphy data with various automatic methods, which are carried out in two- or three-dimensional space. Therefore, the three-dimensional MLS data are previously transformed into the form of a two-dimensional image or a group of aerial images into the form of a three-dimensional point cloud. Regis-tration in 3D space is preferred with low quality of aerial images. The technique of automatic MLS data registration to point clouds generated from aerial images using the ICP method is discussed. It is proposed to predivide the MLS data into fragments. It is shown that the size of fragments for calculating local corrections in horizontal position can differ from the size of fragments for calculating correc-tions in vertical one.
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Kemper, G., A. Weidauer, and T. Coppack. "MONITORING SEABIRDS AND MARINE MAMMALS BY GEOREFERENCED AERIAL PHOTOGRAPHY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B8 (June 23, 2016): 689–94. http://dx.doi.org/10.5194/isprs-archives-xli-b8-689-2016.
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The assessment of anthropogenic impacts on the marine environment is challenged by the accessibility, accuracy and validity of biogeographical information. Offshore wind farm projects require large-scale ecological surveys before, during and after construction, in order to assess potential effects on the distribution and abundance of protected species. The robustness of site-specific population estimates depends largely on the extent and design of spatial coverage and the accuracy of the applied census technique. Standard environmental assessment studies in Germany have so far included aerial visual surveys to evaluate potential impacts of offshore wind farms on seabirds and marine mammals. However, low flight altitudes, necessary for the visual classification of species, disturb sensitive bird species and also hold significant safety risks for the observers. Thus, aerial surveys based on high-resolution digital imagery, which can be carried out at higher (safer) flight altitudes (beyond the rotor-swept zone of the wind turbines) have become a mandatory requirement, technically solving the problem of distant-related observation bias. A purpose-assembled imagery system including medium-format cameras in conjunction with a dedicated geo-positioning platform delivers series of orthogonal digital images that meet the current technical requirements of authorities for surveying marine wildlife at a comparatively low cost. At a flight altitude of 425 m, a focal length of 110 mm, implemented forward motion compensation (FMC) and exposure times ranging between 1/1600 and 1/1000 s, the twin-camera system generates high quality 16 bit RGB images with a ground sampling distance (GSD) of 2 cm and an image footprint of 155 x 410 m. The image files are readily transferrable to a GIS environment for further editing, taking overlapping image areas and areas affected by glare into account. The imagery can be routinely screened by the human eye guided by purpose-programmed software to distinguish biological from non-biological signals. Each detected seabird or marine mammal signal is identified to species level or assigned to a species group and automatically saved into a geo-database for subsequent quality assurance, geo-statistical analyses and data export to third-party users. The relative size of a detected object can be accurately measured which provides key information for species-identification. During the development and testing of this system until 2015, more than 40 surveys have produced around 500.000 digital aerial images, of which some were taken in specially protected areas (SPA) of the Baltic Sea and thus include a wide range of relevant species. Here, we present the technical principles of this comparatively new survey approach and discuss the key methodological challenges related to optimizing survey design and workflow in view of the pending regulatory requirements for effective environmental impact assessments.