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Denner, Michele, and Jacobus H. Raubenheimer. "Assessing a potential solution for spatially referencing of historical aerial photography in South Africa." Proceedings of the ICA 1 (May 16, 2018): 1–7. http://dx.doi.org/10.5194/ica-proc-1-26-2018.
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Historical aerial photography has become a valuable commodity in any country, as it provides a precise record of historical land management over time. In a developing country, such as South Africa, that has undergone enormous political and social change over the last years, such photography is invaluable as it provides a clear indication of past injustices and serves as an aid to addressing post-apartheid issues such as land reform and land redistribution. National mapping organisations throughout the world have vast repositories of such historical aerial photography. In order to effectively use these datasets in today’s digital environment requires that it be georeferenced to an accuracy that is suitable for the intended purpose. Using image-to-image georeferencing techniques, this research sought to determine the accuracies achievable for ortho-rectifying large volumes of historical aerial imagery, against the national standard for ortho-rectification in South Africa, using two different types of scanning equipment. The research conducted four tests using aerial photography from different time epochs over a period of sixty years, where the ortho-rectification matched each test to an already ortho-rectified mosaic of a developed area of mixed land use. The results of each test were assessed in terms of visual accuracy, spatial accuracy and conformance to the national standard for ortho-rectification in South Africa. The results showed a decrease in the overall accuracy of the image as the epoch range between the historical image and the reference image increased. Recommendations on the applications possible given the different epoch ranges and scanning equipment used are provided.
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Wu, F. "Polycentric Urban Development and Land-Use Change in a Transitional Economy: The Case of Guangzhou." Environment and Planning A: Economy and Space 30, no. 6 (June 1998): 1077–100. http://dx.doi.org/10.1068/a301077.
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Since economic reform in 1979 China has witnessed dramatic changes. In particular, the adoption of the new land leasing system in 1987 has led to the transformation of the urban internal structure of this country. Perhaps because of the lack of data, empirical studies lag far behind the rapid urban development and land-use changes currently taking place in China. In this paper the author attempts to examine empirically land-use changes in a fast growing city—Guangzhou—by analyzing data obtained from aerial photographs. The author suggests that some new characteristics have emerged in the distribution of land-use change since the introduction of land reform. Polycentric urban development, a phenomenon that has been attracting wide research attention in Western contexts, has also appeared in the transitional economy. The author demonstrates that besides population density, housing and land value, and firm location, land-use change can be used as a prompt and reliable indicator of polycentric urban development. A range of policy implications are briefly outlined.
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Tamrakar, Rabindra Man. "A Prospect of Digital Airborne Photogrammetry Approach for Cadastral Mapping in Nepal." Journal on Geoinformatics, Nepal 11 (December 3, 2012): 1–6. http://dx.doi.org/10.3126/njg.v11i0.23109.
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Although the history of land recording system is very old in Nepal, systemic cadastral survey was commenced only after the promulgation of Land Measurement Acts in 1963 and the implementation of land reform programme in 1964. Cadastral survey of all 75 districts of Nepal was completed in 1995/96 using traditional graphical method with plane tables and telescopic/plane alidades. Derived information from the existing maps now are outdated and do not fulfill the needs of the general public. 27 out of the 83 district survey offices under Survey Department, Government of Nepal are presently involved in cadastral mapping of the village block areas which previously have been left out in the first phase of surveys (1964-1996). These offices as well are engaged in the preparation of new mapping series of the districts using the same traditional graphical survey method. The speed of this survey is relatively slow and the general public also is not very satisfied with this resurveying method. People now are soliciting for updated and reliable land information based on new cadastral maps due to greater demand for land market and higher land values. Now the time has come to adopt an appropriate innovative approach for resurveying in the country in order to meet the growing public demands on reliable land information system as well as to provide prompt services. Although various technologies in cadastral mapping are currently available, digital airborne photogrammetry using aerial photographs probably could be an appropriate technology for resurveying in Nepal, especially in the hilly districts for developing accurate and reliable land information system.
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Robertson, V. C. "AERIAL PHOTOGRAPHY AND PROPER LAND UTILISATION." Photogrammetric Record 1, no. 6 (August 26, 2006): 5–12. http://dx.doi.org/10.1111/j.1477-9730.1955.tb01034.x.
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Bawden, M. P. "APPLICATIONS OF AERIAL PHOTOGRAPHY IN LAND SYSTEM MAPPING." Photogrammetric Record 5, no. 30 (August 26, 2006): 461–64. http://dx.doi.org/10.1111/j.1477-9730.1967.tb00897.x.
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LITVINOV, Denis V. "MODERN METHODS TO AERO PHOTOFILMING IN THE ARCHITECTURAL AND PLANNING ANALYSIS OF THE URBAN AREA." Urban construction and architecture 5, no. 1 (February 15, 2015): 35–41. http://dx.doi.org/10.17673/vestnik.2015.01.6.
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In article the modern aerial photography from unmanned aerial vehicles as one of methods of the analysis of city building and the territory in design and exploration work is considered. A number of advantages of aerial photography before land photographing is allocated. The retrospective analysis of aerial photography, allowing to track its development from amateur to the professional is carried out. Its application in town planning, reconstruction and new construction is defined. Two main types of aerial photography, used in construction planned and, - perspective are allocated.
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Kyselov, Yurii, Mykhailo Shemiakin, Petro Borovyk, Serhii Kononenko, and Marharyta Melnyk. "GEODESY, CARTOGRAPHY, AND AERIAL PHOTOGRAPHY." GEODESY, CARTOGRAPHY, AND AERIAL PHOTOGRAPHY 93,2021, no. 93 (June 23, 2021): 42–47. http://dx.doi.org/10.23939/istcgcap2021.93.042.
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Aim. The aim of the proposed research is to substantiate the scientific and practical significance of calculating centers of states and regions territories , to conduct a historical review of centrographic research in Ukraine and in the world in the context of evolution of their methodology, to establish geodetic coordinates of the set of points lying on the line of the land state border and coastlines along the seas, and to determine the center of dead weight of the territory of Ukraine as the center of gravity of the broken polygon formed by state territory contours (geodesic center of Ukraine). Methods. In calculating the geodesic center of Ukraine, the authors used a method (in their own interpretation) of determining the center of gravity of the territory, proposed by Jean-Georges Affholder and tested by him in establishing the center of Europe. Results. The history of centrographic research is more than 250 years old, but only in the last-half century they have acquired a proper scientific character, becoming a solid geodesic base. The main milestones in the formation of the centrographic dimension in context of determining the centers of a number of leading world countries and the evolution of research methods are presented. It is established that it is necessary to distinguish the geometric, geographical and geodesic centers of territories, which differ in method of definition and level of accuracy stipulated by calculations requirements. Each of the recognized centers of the territory of Ukraine has its own significance and justification. Scientific novelty. A historical review of definition of the territories centers in the world and in Ukraine has been made. A method of calculating the center of territory gravity of Ukraine as the center of a broken landfill formed by its contours, including the land state border and coastline, is proposed. The concept of "geodesic center" has been introduced to denote the center of territory gravity, which describes a polygonal, including irregular, figure. The location and exact coordinates of the geodesic center of Ukraine, located in the Novoukrayinsky district of Kirovohrad region, has been established. Practical significance . Specifying the location of territories centers is important in terms of optimizing location of manufacturing facilities and infrastructure, as well as potential tourism facilities. The methods used in calculating territories centers of Ukraine can be used not only in conducting similar studies for administrative regions, but also in newly created districts, united territorial communities, etc.
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Pavlov, V. I. "Aerial photography of the water area." Geodesy and Cartography 956, no. 2 (March 20, 2020): 18–24. http://dx.doi.org/10.22389/0016-7126-2020-956-2-18-24.
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During the development of water resources the characteristics of excitement, direction, and flow velocity, depth, points of bottom, temperature and chemical composition of water is to be taken into account. Some of these indicators are determined through the results of measuring single aerial photographs and their stereoscopic pairs. Making aerial photography (APS) of water surface on technology for topographic land survey enables obtaining only single overlapping aerial photographs, as the water surface is in constant motion. Stereoscopic pairs of aerial photographs can be obtained if photographing is performed simultaneously by two aerial cameras (AFA) with close elements of internal orientation. The author considers two technological schemes of using two AFA in aerial photography of water space
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Doskich, Sofiia. "GEODESY, CARTOGRAPHY, AND AERIAL PHOTOGRAPHY." GEODESY, CARTOGRAPHY, AND AERIAL PHOTOGRAPHY 93,2021, no. 93 (June 23, 2021): 35–41. http://dx.doi.org/10.23939/istcgcap2021.93.035.
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The emergence of satellite observations was marked by their widespread use to determine the velocities and direction of horizontal motions of lithosphere plates (modern kinematics of lithosphere plates), which allowed to research the deformation processes at the global and regional levels. Today, permanent GNSS stations cover a large part of the land area. Since many of these stations have accumulated a large amount of daily observation over 20 years, it is possible to trace the deformation processes of certain areas. There is the problem of correct identification of observations of the true parameters of the deformation process. This issue requires the joint work of geophysicists and geodesists. But high-precision time series and values of GNSS station velocities are important and perspective data for the interpretation of geodynamic processes, which are much easier to obtain than geophysical or geological data, do not require special costs and should take into account their active development, the number of such stations is growing rapidly. Today, according to unofficial data, more than 300 reference stations operate in Ukraine. The aim of this work is to detect deformations of the Earth's crust in the Carpathian folded system using GNSS technology. The input data for the research were the observations over eight years (2013-2020) at reference stations in Ukraine (ZAKPOS network). From these observations, the combined solution (coordinates time series and velocities) was calculated using the scientific software GAMIT / GLOBK. According to the obtained data, the horizontal displacements vectors of GNSS stations were also constructed, and the deformations of the Earth's crust were calculated by the method of triangles, the vertices of which are GNSS stations, using the GPS Triangle Strain Calculator software. The calculated values of deformations showed a different geodynamic value, depending on the location of the triangles. In particular, the active zones of stretching (Rakhiv-Verkhovyna and Syanok-Ustryky-Dolishni) and compression (Rakhiv-Khust-Mukachevo) were identified. The research results make it possible to establish the features of the spatial distribution of crustal movement in the Carpathian region and in the future in a joint interpretation with geophysical data to create a regional geodynamic model of the Carpathian folded system.
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Fensham, R. J., and R. J. Fairfax. "Effect of photoscale, interpreter bias and land type on woody crown-cover estimates from aerial photography." Australian Journal of Botany 55, no. 4 (2007): 457. http://dx.doi.org/10.1071/bt05211.
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Woody vegetation cover interpreted from aerial photography requires assessment against field data as the signature of woody vegetation cover may differ between photoscales, vegetation types and photo-interpreters. Measurements of aerial woody cover taken from aerial photography of four different photoscales were compared with a field dataset from Eucalyptus- and Acacia-dominated landscapes of semi-arid Queensland. Two interpreters employed a method that utilises a stereoscope and sample-point graticule for manual quantified measurements of aerial woody cover. Both interpreters generated highly significant models accounting for 77 and 78% of deviance. Photoscale appears to have a consistent effect whereby the signature of woody cover increases as the photoscale decreases from 1 : 25 000 to 1 : 80 000, although the magnitude of this effect was different between interpreters. The results suggest no substantial differences in the shape of models predicting crown cover between Acacia- and Eucalyptus-dominated land types, although the precision of the models was greater for the Acacia (90–91% of residual deviance) than for the Eucalyptus (50–56% of residual deviance) land type. The reduced accuracy in the Eucalyptus land type probably reflects the relatively diffuse crowns of the dominant trees. The models generated for this dataset are within the range of those from other calibration studies employing photography of a range of scales and methodologies. The effect of photoscale is verified between the available studies, but there may also be variations arising from methodological differences or image properties. The present study highlights the influence of photoscale and interpreter bias for assessing woody crown cover from aerial photography. Studies that employ aerial photography should carefully consider potential biases and cater for them by calibrating assessments with field measurements.
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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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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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Huda, Feblil, Kaspul Anuar, Syafri Syafri, and Anita Susilawati. "PEMBUATAN PETA GEOSPASIAL MELALUI PEMETAAN UDARA PADA KELURAHAN BATU BERSURAT, KECAMATAN XIII KOTO KAMPAR, KABUPATEN KAMPAR, PROVINSI RIAU." Dinamisia : Jurnal Pengabdian Kepada Masyarakat 3, no. 1 (June 25, 2019): 76–83. http://dx.doi.org/10.31849/dinamisia.v3i1.2060.
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One of the most commonly used geospatial mapping methods is photogrammetry (aerial mapping). Photogrammetry is a method of mapping objects on the surface of the earth by using aerial photography as a medium. The aerial mapping process is carried out through cameras installed on Unmanned Aerial Vehicle (UAV). From the aerial photography, object interpretation and geometry measurements will be carried out to produce line maps, digital maps and photo maps. In general, photogrammetry is a mapping technology by utilizing aerial photography to be processed into a geo-spatial information system. Batu Bersurat Village is one of the villages located in Subdistrict XIII Koto Kampar, Kampar Regency, which did not have a geospatial information map. Community service team from the Mechanical Engineering Department of the University of Riau had a plan to carry out community service activities in Batu Besurat Village in the form of making geospatial information maps through aerial mapping. This aerial mapping activity was carried out by utilizing UAV with the type of fixed wing. In its implementation, the community service activities were planned to involve Mechanical Engineering students, university students of the University of Riau, village officials and the local community. It is expected that with this community service program, the geospatial information system map made by Batu Bersurat Village can be used in village spatial planning for agricultural land, residential land and validation of village boundaries.
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Mora, Carla, Gonçalo Vieira, Pedro Pina, Maura Lousada, and Hanne H. Christiansen. "Land cover classification using high‐resolution aerial photography in adventdalen, svalbard." Geografiska Annaler: Series A, Physical Geography 97, no. 3 (September 2015): 473–88. http://dx.doi.org/10.1111/geoa.12088.
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Colville, David, Brittany Reeves, Darien Ure, Bill Livingstone, and Heather Stewart. "Mapping the topography and land cover of Sable Island." Proceedings of the Nova Scotian Institute of Science (NSIS) 48, no. 2 (May 7, 2016): 285. http://dx.doi.org/10.15273/pnsis.v48i2.6660.
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In September 2014 the Applied Geomatics Research Group (AGRG) completed a third aerial mapping campaign of Sable Island. The AGRG first mapped the island in October 2002 with an aerial photography survey. Then in August 2009 AGRG conducted an aerial photography and Light Detection And Ranging (LiDAR) survey. Five years later these same technologies were deployed again. Each of these surveys led to an orthophoto mosaic of the island and a mapping of the land cover. The 2009 and 2014 surveys also mapped the island’s topography using Digital Surface Models (DSMs) derived from the LiDAR data. Ground-truthing efforts associated with each survey provided data to assist with the interpretation and validation of the results.The repeat surveys resulted in an excellent opportunity to quantify the topographic and land cover changes that have occurred on the island. The mapped results provide a comparison of how and where these changes have occurred over the years. AGRG is working with Parks Canada to better understand how the topography and land cover are changing. This understanding will contribute to Parks Canada Ecological Integrity monitoring program for Sable Island and inform the management planning process for one of Canada’s newest national parks.
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Su, Wen-June, and Christopher Stohr. "Aerial-photointerpretation of landslides along the Ohio and Mississippi rivers." Environmental and Engineering Geoscience 6, no. 4 (November 1, 2000): 311–23. http://dx.doi.org/10.2113/gseegeosci.6.4.311.
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Abstract A landslide inventory was conducted along the Ohio and Mississippi rivers in the New Madrid Seismic Zone of southern Illinois, between the towns of Olmsted and Chester, Illinois. Aerial photography and field reconnaissance identified 221 landslides of three types: rock/debris falls, block slides, and undifferentiated rotational/translational slides. Most of the landslides are small- to medium-size, ancient rotational/translational features partially obscured by vegetation and modified by weathering. Five imagery sources were interpreted for land-slides: 1:250,000-scale side-looking airborne radar (SLAR); 1:40,000-scale, 1:20,000-scale, 1:6,000-scale, black and white aerial photography; and low altitude, oblique 35-mm color photography. Landslides were identified with three levels of confidence on the basis of distinguishing characteristics and ambiguous indicators. SLAR imagery permitted identification of a 520 hectare mega-landslide which would not have been identified on medium-scale aerial photography. The leaf-off, 35-mm color, oblique photography provided the best imagery for confident interpretation of detailed features needed for smaller landslides.
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Blinn, Charles R., Al Lyons, and Edward R. Buckner. "Color Aerial Photography for Assessing the Need for Fertilizers in Loblolly Pine Plantations." Southern Journal of Applied Forestry 12, no. 4 (November 1, 1988): 270–73. http://dx.doi.org/10.1093/sjaf/12.4.270.
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Abstract Color aerial photography was used to assess crown color classes in loblolly pine (Pinus taeda L.) plantations. Three distinct Munsell color classes were delineated on the resulting photographs. Foliar N levels and, to a lesser degree, foliar K levels were directly related to color. Significant relationships between color and site index and color and basal area were shown. Application of color aerial photography, combined with Munsell color coding, could expedite land classification and also make possible more efficient use of fertilizers. South J. Appl. For. 12(4):270-273.
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Li, Xiaoxiao, Soe W. Myint, Yujia Zhang, Chritopher Galletti, Xiaoxiang Zhang, and Billie L. Turner. "Object-based land-cover classification for metropolitan Phoenix, Arizona, using aerial photography." International Journal of Applied Earth Observation and Geoinformation 33 (December 2014): 321–30. http://dx.doi.org/10.1016/j.jag.2014.04.018.
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Gerard, F., S. Petit, G. Smith, A. Thomson, N. Brown, S. Manchester, R. Wadsworth, et al. "Land cover change in Europe between 1950 and 2000 determined employing aerial photography." Progress in Physical Geography: Earth and Environment 34, no. 2 (March 30, 2010): 183–205. http://dx.doi.org/10.1177/0309133309360141.
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BIOPRESS (‘Linking Pan-European Land Cover Change to Pressures on Biodiversity’), a European Commission funded ‘Global Monitoring for Environment and Security’ project, produced land cover change information (1950—2000) for Europe from aerial photographs and tested the suitability of this for monitoring habitats and biodiversity. The methods and results related to the land cover change work are summarized. Changes in land cover were established through 73 window and 59 transect samples distributed across Europe. Although the sample size was too small and biased to fully represent the spatial variability observed in Europe, the work highlighted the importance of method consistency, the choice of nomenclature and spatial scale. The results suggest different processes are taking place in different parts of Europe: the Boreal and Alpine regions are dominated by forest management; abandonment and intensification are mainly encountered in the Mediterranean; urbanization and drainage are more characteristic of the Continental and Atlantic regions.
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Fox, A. J., and A. P. R. Cooper. "Climate-change indicators from archival aerial photography of the Antarctic Peninsula." Annals of Glaciology 27 (1998): 636–42. http://dx.doi.org/10.3189/1998aog27-1-636-642.
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Aerial photography has been used as a mapping tool in the Antarctic Peninsula region sinre the late 1920s. Following pioneering work by Wilkins in 1928, Ellsworth in 1934 and the British Graham Land Expedition in 1934-37, the Falkland Islands and Dependencies Aerial Survey Expedition carried out extensive aerial photography during the period 1955-57. Since then, many other aerial surveys have been carried out, and the result is an archive of aerial photography that, for some localities, spans 40 years. The production of maps both from different generations of photographs and satellite images has revealed many changes in the extent of ice cover with time. For example, changes in ice shelves such as the Wordie Ice Shelf, Larsen Ice Shelf and Müller Ice Shelf, are well recorded, and the termini of some glaciers have retreated. However, the most pervasive change is the consistent decline in the extent of small bodies of snow and ice. This paper shows how perennial snow or ice cover has decreased in the northern Marguerite Bay area, at 68°S. The correlation of the change with elevation and with climate records from Adelaide and Rothera research stations in the Antarctic Peninsula region is examined.
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Allen, Josef, and Frederik Samuel Papilaya. "Estimated Land and Building Tax using Aerial Photography (Case Study: Tingkir District, Salatiga City)." Journal of Applied Geospatial Information 4, no. 2 (August 3, 2020): 372–78. http://dx.doi.org/10.30871/jagi.v4i2.2216.
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Salatiga, a city that borders directly and is surrounded by Semarang Regency. It has an area of 56.78 km2, with four sub-districts including, Sidorejo Regency, Argomulyo Regency, Tingkir Regency, and Sidomukti Regency, which covers 23 villages. The city of Salatiga has a fairly high population density with a proportion of more than 3300 inhabitants / km2. In this study took place in the Central Tingkir and Tingkir Lor areas by taking several points that are considered as housing as a case study. This study aims to estimate the price of land and building tax on an object of land and building tax. The process of this research uses aerial photo processing, where aerial photographs will be processed using professional software Agisoft photoscan to become an orthophoto, digital surface models and digital terrain models to obtain building area and land area data, then digital surface models and digital terrain models are processed . with ArcGIS 10.6 software using a raster calculator to get the height of the object to be used as the height of the building. The data obtained will be used to perform land and building tax calculations. The results of this study estimate the estimated land and building tax prices of at least IDR 37,313.00 and a maximum value of IDR 3,809,763.00.
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Peña-Barragán, José M., Francisca López-Granados, Montserrat Jurado-Expósito, and Luis García-Torres. "Sunflower yield related to multi-temporal aerial photography, land elevation and weed infestation." Precision Agriculture 11, no. 5 (November 24, 2009): 568–85. http://dx.doi.org/10.1007/s11119-009-9149-6.
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Fensham, Roderick J., and Russell J. Fairfax. "A land management history for central Queensland, Australia as determined from land-holder questionnaire and aerial photography." Journal of Environmental Management 68, no. 4 (August 2003): 409–20. http://dx.doi.org/10.1016/s0301-4797(03)00110-5.
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Fensham, R. J., and R. J. Fairfax. "Assessing woody vegetation cover change in north-west Australian savanna using aerial photography." International Journal of Wildland Fire 12, no. 4 (2003): 359. http://dx.doi.org/10.1071/wf03022.
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Models to calibrate tree and shrub cover assessed from aerial photography with field measurements were developed for a range of vegetation types in north-western Australia. The models verify previous studies indicating that woody cover can be successfully determined from aerial photography. The calibration models were applied to estimates of woody vegetation cover determined for 279 randomly located sample areas in the Ord–Victoria Rivers region using aerial photography from 1948 to 1950 and 1988 to 1997. Overstorey cover increased from a regional average of 11.5% to 13.5% and understorey cover increased from 1.3% to 2.0%. Downs, Limestone Hills and Alluvia land-types showed the most substantial increases in overstorey cover while overstorey cover in the Limestone plains land-type decreased. Relatively open structured vegetation is most susceptible to thickening. Rainfall records reveal an extreme multi-year rainfall deficit in the study area in the 1930s and relatively wet times in the 1970s and 1980s. Interpretation of a limited set of aerial photographs taken between 1964 and 1972 suggests that most of the increases in cover have occurred since this time. The study highlights the possibility that the average trend of vegetation thickening represents recovery during the relatively wet times after the 1970s. There was no relationship between structural change and a grazing intensity surrogate (distance of sample points to stock watering-points). However, the causes of structural change are undoubtedly multi-factored and the relative contributions of climate, fire and grazing vary for different landscapes and tree species.
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Fairfax, R. J., and R. J. Fensham. "Corrigendum to: Assessing woody vegetation cover change in north-west Australian savanna using aerial photography." International Journal of Wildland Fire 13, no. 1 (2004): 131. http://dx.doi.org/10.1071/wf03022_co.
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Models to calibrate tree and shrub cover assessed from aerial photography with field measurements were developed for a range of vegetation types in north-western Australia. The models verify previous studies indicating that woody cover can be successfully determined from aerial photography. The calibration models were applied to estimates of woody vegetation cover determined for 279 randomly located sample areas in the Ord–Victoria Rivers region using aerial photography from 1948 to 1950 and 1988 to 1997. Overstorey cover increased from a regional average of 11.5% to 13.5% and understorey cover increased from 1.3% to 2.0%. Downs, Limestone Hills and Alluvia land-types showed the most substantial increases in overstorey cover while overstorey cover in the Limestone plains land-type decreased. Relatively open structured vegetation is most susceptible to thickening. Rainfall records reveal an extreme multi-year rainfall deficit in the study area in the 1930s and relatively wet times in the 1970s and 1980s. Interpretation of a limited set of aerial photographs taken between 1964 and 1972 suggests that most of the increases in cover have occurred since this time. The study highlights the possibility that the average trend of vegetation thickening represents recovery during the relatively wet times after the 1970s. There was no relationship between structural change and a grazing intensity surrogate (distance of sample points to stock watering-points). However, the causes of structural change are undoubtedly multi-factored and the relative contributions of climate, fire and grazing vary for different landscapes and tree species.
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Ye, Dongmei, Ming Liao, Ao Nan, Enquan Wang, and Gaowei Zhou. "RESEARCH ON REEF BATHYMETRIC SURVEY OF UAV STEREOPAIR BASED ON TWO-MEDIUM PHOTOGRAMMETRY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 3, 2016): 407–12. http://dx.doi.org/10.5194/isprsarchives-xli-b1-407-2016.
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This paper is based on the principles of two-medium photogrammetry, with the purpose to perform a bathymetric survey of a reef in the South China Sea, using aerial imagery acquired by UAV. The first objectives are to introduce the basic principles of two-medium photogrammetry, discuss the technical requirements of this methodology to determine an accurate refractive index of sea water, and propose a new method to calculate seawater refraction and calculate corrected reef elevations. The second objective is to analyse and integrate the elevation and depth datum for both the land mass and the undersea reef. The final objective of this paper is performing stereoscopic mensuration on the UAV photography in order to transform reef elevation and depth datum. Our test shows that aerial two-medium photogrammetry is feasible in practical application, but requires relatively high aerial photography conditions.
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Ye, Dongmei, Ming Liao, Ao Nan, Enquan Wang, and Gaowei Zhou. "RESEARCH ON REEF BATHYMETRIC SURVEY OF UAV STEREOPAIR BASED ON TWO-MEDIUM PHOTOGRAMMETRY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (June 3, 2016): 407–12. http://dx.doi.org/10.5194/isprs-archives-xli-b1-407-2016.
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This paper is based on the principles of two-medium photogrammetry, with the purpose to perform a bathymetric survey of a reef in the South China Sea, using aerial imagery acquired by UAV. The first objectives are to introduce the basic principles of two-medium photogrammetry, discuss the technical requirements of this methodology to determine an accurate refractive index of sea water, and propose a new method to calculate seawater refraction and calculate corrected reef elevations. The second objective is to analyse and integrate the elevation and depth datum for both the land mass and the undersea reef. The final objective of this paper is performing stereoscopic mensuration on the UAV photography in order to transform reef elevation and depth datum. Our test shows that aerial two-medium photogrammetry is feasible in practical application, but requires relatively high aerial photography conditions.
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Sofyan, Agus. "Classification of Land Cover by Using Aerial Photo At CV. Alaska Prima Coal, Cooling Village, Sanga-Sanga Sub-district, Kutai Kartanegara District, East Kalimantan Province." AGRIFOR 17, no. 1 (March 9, 2018): 1. http://dx.doi.org/10.31293/af.v17i1.3090.
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Remote sensing can be done visually and digitally. one of the advantages of airborne photography data generated by drone (phantom-3) compared to satellite imagery with optical sensitivity is its ability to obtain cloud-free images and freedom of recording time and the displayed area shows clearly defined objects corresponding to land cover. characteristics. To limit the object-based area of this research method applied is Object Based Image Analysis (OBIA).This study aims to classify land cover using highly resolved aerial photography with the help of Object Based Image Analysis (OBIA) technique and calculate the accuracy and accuracy, land cover classification by using Objeck Based Image (OBIA) analysis through examination of field conditions.classifying land cover, the classification includes shrubs, young shrubs, plantations (oil palms), shrubs, mines, open land, roads and water bodies with Accuracy of Overcome 0.86.
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Clark, Andrew, and Joel McKechnie. "Detecting Banana Plantations in the Wet Tropics, Australia, Using Aerial Photography and U-Net." Applied Sciences 10, no. 6 (March 16, 2020): 2017. http://dx.doi.org/10.3390/app10062017.
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Bananas are the world’s most popular fruit and an important staple food source. Recent outbreaks of Panama TR4 disease are threatening the global banana industry, which is worth an estimated $8 billion. Current methods to map land uses are time- and resource-intensive and result in delays in the timely release of data. We have used existing land use mapping to train a U-Net neural network to detect banana plantations in the Wet Tropics of Queensland, Australia, using high-resolution aerial photography. Accuracy assessments, based on a stratified random sample of points, revealed the classification achieves a user’s accuracy of 98% and a producer’s accuracy of 96%. This is more accurate compared to existing (manual) methods, which achieved a user’s and producer’s accuracy of 86% and 92% respectively. Using a neural network is substantially more efficient than manual methods and can inform a more rapid respond to existing and new biosecurity threats. The method is robust and repeatable and has potential for mapping other commodities and land uses which is the focus of future work.
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Piekielek, Nathan. "A semi-automated workflow for processing historic aerial photography." Abstracts of the ICA 1 (July 15, 2019): 1. http://dx.doi.org/10.5194/ica-abs-1-299-2019.
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<p><strong>Abstract.</strong> Libraries, museums and archives were the original big geospatial information repositories that to this day house thousands to millions of resources containing research-quality geographic information. However, these print resources (and their digital surrogates), are not easily incorporated into the contemporary research process because they are not structured data that is required of web-mapping and geographic information system tools. Fortunately, contemporary big data tools and methods can help with the large-scale conversion of historic resources into structured datasets for mapping and spatial analysis.</p><p>Single frame historic aerial photographs captured originally on film (hereafter “photographs”), are some of the most ubiquitous and information-rich geographic information resources housed in libraries, museums and archives. Photographs authentically encoded information about past places and time-periods without the thematic focus and cartographic generalization of historic print maps. As such, they contain important information in nearly every category of base mapping (i.e. transportation networks, populated places etc.), that is useful to a broad spectrum of research projects and other applications. Photographs are also some of the most frustrating historic resources to use due to their very large map-scale (i.e. small geographic area), lack of reference information and often unknown metadata (i.e. index map, flight altitude, direction etc.).</p><p>The capture of aerial photographs in the contiguous United States (U.S.) became common in the 1920s and was formalized in government programs to systematically photograph the nation at regular time intervals beginning in the 1930s. Many of these photography programs continued until the 1990s meaning that there are approximately 70 years of “data” available for the U.S. that is currently underutilized due to inaccessibility and the challenges of converting photographs to structured data. Large collections of photographs include government (e.g. the U.S. Department of Agriculture Aerial Photography Field Office “The Vault” – over 10 million photographs), educational (e.g. the University of California Santa Barbara Library – approximately 2.5 million photographs), and an unknown number non-governmental organizations (e.g. numerous regional planning commissions and watershed conservation groups). Collectively these photography resources constitute an untapped big geospatial data resource.</p><p>U.S. government photography programs such as the National Agricultural Imagery Program continued and expanded in the digital age (i.e. post early 2000s), so that not only is there opportunity to extend spatial analyses back in time, but also to create seamless datasets that integrate with current and expected future government aerial photography campaigns. What is more, satellite imagery sensors have improved to the point that there is now overlap between satellite imagery and aerial photography in terms of many of their technical specifications (i.e. spatial resolution etc.). The remote capture of land surface imagery is expanding rapidly and with it are new opportunities to explore long-term land-change analyses that require historical datasets.</p><p>Manual methods to process photographs are well-known, but are too labour intensive to apply to entire photography collections. Academic research on methods to increase the discoverability of photographs and convert them to geospatial data at large-scale has to date been limited (although see the work of W. Karel et al.). This presentation details a semi-automated workflow to process historic aerial photographs from U.S. government sources and compares the workflow and results to existing methods and datasets. In a pilot test area of 94 photographs in the U.S. state of Pennsylvania, the workflow was found to be nearly 100-times more efficient than commonly employed alternatives while achieving greater horizontal positional accuracy. Results compared favourably to contemporary digital aerial photography data products, suggesting that they are well-suited for integration with contemporary datasets. Finally, initial results of the workflow were incorporated into several existing online discovery and sharing platforms that will be highlighted in this presentation. Early online usage statistics as well as direct interaction with users demonstrates the broad interest and high-impact of photographs and their derived products (i.e. structured geospatial data).</p>
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Yamamoto, Hajime. "Aerial Surveys and Geographic Information in Modern China." Abstracts of the ICA 1 (July 15, 2019): 1–2. http://dx.doi.org/10.5194/ica-abs-1-414-2019.
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<p><strong>Abstract.</strong> Today when online satellite images are just a click away, access to geographic information showing the latest images of the globe has dramatically expanded, and historico-geographic research based on such information is flourishing. However, in the study of Chinese history, historical research employing GIS or similar technologies is still in its infancy, since “historical” geographic information with a high degree of precision are lacking. From within the ambit of Chinese geographic information, this report specifically highlights aerial surveys effected during the Republic of China era. To start, we review the history of domestic aerial surveys during R. O. C. period. Then, focusing on Nanjing as an example, we proceed to introduce maps that were actually created based on aerial surveys.</p><p>Chinese aerial surveys date back to around 1930. At the Nationalist Party’s General Assembly in 1929, partisans proposed for the need for aerial surveys. In 1930, the “Aerial Photography and Survey Research Team” was formed within the General Land Survey Department at General Staff Headquarters (National Army of the Republic of China). Consequently, foreign technicians were invited to provide relevant education/training. In June 1931, China’s pioneer initiative in aerial photography took place in Zhejiang province. The aim of aerial surveys in those early days was to create maps for military purposes. Between 1932 and 1939, topographic maps of fortifications located in areas such as the Jiangnan district were prepared. Further, starting from around the same period until the Sino-Japanese War, land registry maps based on aerial surveys were also produced. After the Sino-Japanese War ended, the above-mentioned directorate handed over responsibility for aerial surveys to the Naval General Staff. However, in 1949 the Chinese Communist Party confiscated the maps theretofore produced.</p><p>Although the aerial photographs and the geographic information produced therefrom during the R. O. C. era were seized by the People’s Republic of China, in actuality, some had previously been transferred to Taiwan. The topographic maps of the Nanjing metropolitan area (一萬分一南京城廂附近圖), based on aerial surveys and drawn in 1932, are currently archived at Academia Historica in Taipei. Comprising a total of 16 sheets, these maps were drawn on a scale of 1:10,000 by the General Land Survey Department.</p><p>Similarly, other maps (各省分幅地形圖) produced by the General Land Survey Department, comprising a total of 56 sheets and partly detailing Nanjing, are now in the possession of Academia Sinica in Taipei. There was no information about photographing or making in these maps. But almost the same maps were archived at Library of Congress in Washington D. C. According to those maps at LC, based on aerial photographs taken and surveys conducted in 1933, these topographic maps (1:10,000 scale) were completed in 1936.</p><p>The examples introduced above are topographic maps based on aerial photography. However, starting in 1937, land registry maps were also created. Detailing the outskirts of Nanjing (1:1,000 scale) and comprising a total of 121 sheets, they are now archived at Academia Historica. While the land registry maps were produced in 1937, supplementary surveys were effected following the Sino-Japanese War in 1947.</p><p>Since the geographic information based on aerial surveys during the R. O. C. era in China were precise, they can serve as a source of manifold information. This report only delved into information developed by the Government of the R. O. C., but it is becoming evident that U. S. Armed Forces and Japan also produced geographic information of their own based on aerial surveys. If the comprehensive panorama captured by all three protagonists can be illuminated, further advances in Chinese historico-geographic studies employing geographic information will be forthcoming.</p>
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Strand, Eva K., M. Tess O’Sullivan, and Stephen C. Bunting. "Time Series Aerial Photography Can Help Land Owners and Managers Understand Local Aspen Dynamics." Rangelands 34, no. 5 (October 2012): 21–29. http://dx.doi.org/10.2111/rangelands-d-12-00022.1.
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HE, Hong, XiangLan LI, Xiao CHENG, RenBin ZHU, JianWu TANG, FengMing HUI, WenHui WU, TianCheng ZHAO, Yan LIU, and Jing KANG. "Aerial photography based estimation of greenhouse gas emissions from penguins in Victoria Land, Antarctica." Chinese Science Bulletin 61, no. 30 (September 28, 2016): 3268–77. http://dx.doi.org/10.1360/n972016-00546.
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Cots‐Folch, R., M. J. Aitkenhead, and J. A. Martínez‐Casasnovas. "Mapping land cover from detailed aerial photography data using textural and neural network analysis." International Journal of Remote Sensing 28, no. 7 (April 2007): 1625–42. http://dx.doi.org/10.1080/01431160600887722.
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Jenčo, Marián, Emil Fulajtár, Hana Bobáľová, Igor Matečný, Martin Saksa, Miroslav Kožuch, Michal Gallay, Ján Kaňuk, Vladimír Píš, and Veronika Oršulová. "Mapping Soil Degradation on Arable Land with Aerial Photography and Erosion Models, Case Study from Danube Lowland, Slovakia." Remote Sensing 12, no. 24 (December 10, 2020): 4047. http://dx.doi.org/10.3390/rs12244047.
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The presented study uses the recent colour aerial photographs, historical black and white aerial photographs, and detailed digital elevation model to assess the spatial distribution and long-term temporal dynamics of soil loss in agriculturally intensively exploited loess hilly land with a subcontinental temperate climate. The strongly eroded soils appear in the studied area as bright patterns, surrounded by darker soils, and they are well visible on aerial photos. Three approaches of interpretation of aerial photographs were tested: visual interpretation, pixel-based image classification, and object-based image classification. All three methods provided detailed maps of soil redistribution patterns. The bright areas as the areas of soil degradation characterized by erosion increased from 1949 until 2011 by 76%. A detailed map of areal erosion patterns was used for the validation of water erosion models. LS-factor of USLE and ED’ index of USPED were selected for expressing the relation of real erosion to the terrain. The relationship between surface morphology and real erosion is very complex, and the tested water erosion models do not express it sufficiently. Therefore, the first and second-order directional derivative of the surface elevations with respect to the tillage direction has been tested. The absolute value of the first-order directional derivative showed better results and better corresponded with the real erosion pattern than the other morphometric characteristics. The findings suggest that tillage is the dominant erosion factor in the area.
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Gonçalves, J. A. "AUTOMATIC ORIENTATION AND MOSAICKING OF ARCHIVED AERIAL PHOTOGRAPHY USING STRUCTURE FROM MOTION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-3/W4 (March 17, 2016): 123–26. http://dx.doi.org/10.5194/isprs-archives-xl-3-w4-123-2016.
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Aerial photography has been acquired regularly for topographic mapping since the decade of 1930. In Portugal there are several archives of aerial photos in national mapping institutes, as well as in local authorities, containing a total of nearly one hundred thousand photographs, mainly from the 1940s, 1950s and some from 1930s. These data sets provide important information about the evolution of the territory, for environment and agricultural studies, land planning, and many other examples. There is an interest in making these aerial coverages available in the form of orthorectified mosaics for integration in a GIS. <br><br> The orthorectification of old photographs may pose several difficulties. Required data about the camera and lens system used, such as the focal distance, fiducial marks coordinates or distortion parameters may not be available, making it difficult to process these data in conventional photogrammetric software. <br><br> This paper describes an essentially automatic methodology for orientation, orthorectification and mosaic composition of blocks of old aerial photographs, using Agisoft Photoscan structure from motion software. The operation sequence is similar to the processing of UAV imagery. The method was applied to photographs from 1947 and 1958, provided by the Portuguese Army Geographic Institute. The orientation was done with GCPs collected from recent orthophototos and topographic maps. This may be a difficult task, especially in urban areas that went through many changes. Residuals were in general below 1 meter. The agreement of the orthomosaics with recent orthophotos and GIS vector data was in general very good. The process is relatively fast and automatic, and can be considered in the processing of full coverages of old aerial photographs.
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Caccetta, Peter, Simon Collings, Andrew Devereux, Kassell Hingee, Don McFarlane, Anthony Traylen, Xiaoliang Wu, and Zheng-Shu Zhou. "Monitoring land surface and cover in urban and peri-urban environments using digital aerial photography." International Journal of Digital Earth 9, no. 5 (July 24, 2015): 457–75. http://dx.doi.org/10.1080/17538947.2015.1046510.
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Havlová, M. "Identification of the Location of Vanished Objects of Baroque Land in Lysá Nad Labem." Scientia Agriculturae Bohemica 50, no. 4 (December 1, 2019): 259–66. http://dx.doi.org/10.2478/sab-2019-0032.
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Abstract The case study focuses on localizing the vanished complex of Count Špork’s baroque landscape at Lysá nad Labem using aerial photography. The only source localizing the former historical objects is Vogt’s veduta from 1712. The objects were not captured in any historical cartographic materials, as they had disappeared before the first mapping of the territory. So no relevant information on the vanished objectsis at disposal. The results of the present study are rectification of the objects in the southwestern part of Vogt’s veduta and aerial images of the previously unspecified structures near the former hospital Karlov. The study provides more information on one of the largest vanished baroque complexes in Central Europe and opens up further for closer studies of this area including thebaroque landscape. At the same time, the effectiveness of aerial survey for the needs of landscape planning has been confirmed. Thanks to localizing the vanished monuments, they can be incorporated into the landscape planning system and approached as a cultural heritage, a value and a limit of the territory.
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Gonçalves, J. A. "AUTOMATIC ORIENTATION AND MOSAICKING OF ARCHIVED AERIAL PHOTOGRAPHY USING STRUCTURE FROM MOTION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-3/W4 (March 17, 2016): 123–26. http://dx.doi.org/10.5194/isprsarchives-xl-3-w4-123-2016.
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Aerial photography has been acquired regularly for topographic mapping since the decade of 1930. In Portugal there are several archives of aerial photos in national mapping institutes, as well as in local authorities, containing a total of nearly one hundred thousand photographs, mainly from the 1940s, 1950s and some from 1930s. These data sets provide important information about the evolution of the territory, for environment and agricultural studies, land planning, and many other examples. There is an interest in making these aerial coverages available in the form of orthorectified mosaics for integration in a GIS. <br><br> The orthorectification of old photographs may pose several difficulties. Required data about the camera and lens system used, such as the focal distance, fiducial marks coordinates or distortion parameters may not be available, making it difficult to process these data in conventional photogrammetric software. <br><br> This paper describes an essentially automatic methodology for orientation, orthorectification and mosaic composition of blocks of old aerial photographs, using Agisoft Photoscan structure from motion software. The operation sequence is similar to the processing of UAV imagery. The method was applied to photographs from 1947 and 1958, provided by the Portuguese Army Geographic Institute. The orientation was done with GCPs collected from recent orthophototos and topographic maps. This may be a difficult task, especially in urban areas that went through many changes. Residuals were in general below 1 meter. The agreement of the orthomosaics with recent orthophotos and GIS vector data was in general very good. The process is relatively fast and automatic, and can be considered in the processing of full coverages of old aerial photographs.
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Suharjo, S., Sugiharto Budi Santoso, Pujo Nur Cahyo, M. Mulyono, and Heru Sri Widodo. "Infra Red Aerial Photograph Interpretation for Soil Erosion at Wuryantoro, Wonogiri." Forum Geografi 15, no. 1 (July 20, 2016): 29. http://dx.doi.org/10.23917/forgeo.v15i1.4661.
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Collecting data of soil erosion hazard terrestrially needs much time, high cost, and large energy. Therefore it is needed appropriate technology in addition to terrestrially decreasing necessity of time, cost and energy. Aerial photograph is picture of earth surface, which shape and place similar to condition on earth surface. Using aerial photograph in this research is expected to be able to take account for erosion factors. This research is conducted in Kecamatan Wuryantoro Kabupaten Wonogiri. Research method that used is aerial photograph interpretation with land unit approach. Amounts of soil lost are approached with USLE formula. Aerial photograph that used in this research is aerial photograph coloured infrared with 1:10.000 in scale and 1991 in year of taking photography. The result shows that using aerial photograph is very useful in supporting soil erosion rate calculation. Erosion rate at research area is 0.0968 ton/ha/year to 100.4344 ton/ha/year. This number is included in class of light erosion hazard (
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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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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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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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Namboonruang, Weerapol, Nutthanan Suphadon, and Prayoon Yong-Amnuai. "An Application of Aerial Photographs with Geographic Coordinates to a Rural Digital Map." Advanced Materials Research 450-451 (January 2012): 1103–7. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.1103.
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Making geological map Muangmai sub-district, Amphawa district, Samutsongkram Province area of Thailand is the example area. The conclusion of making map, which use the land section data together with the an aerial photography ortho- colour type and coordinate by GPS in field work and store data in digital map format, is totally 1,045 plots. These areas are summary of 3,944,000.00 m2 classified into 118,400.00 m2 for public roads, 108,800.00 m2 for public canals, 3,563,200.00 m2 for dwellings and agricultural lands and 153,600 m2 for public places, temples and schools.
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Arnanto, Ardhi, Estuning Tyas Wulan Mei, Dyah Rahmawati Hizbaron, and Westi Utami. "Pesawat Udara Nir Awak (Uav) Untuk Penyediaan Data Spasial Bidang Tanah Di Kawasan Rawan Bencana." BHUMI: Jurnal Agraria dan Pertanahan 5, no. 2 (December 2, 2019): 271–81. http://dx.doi.org/10.31292/jb.v5i2.377.
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Abstract: The increased disaster events in the last ten years warns all stakeholders about potential hazards. Potential risk to land assets due to disaster affects the needs of fast and accurate land data that only 65% mapped. This study aims to establish an interpretation method and mapping of paddy field using unmanned aerial vehicle (UAV). The research uses interpretation method by evidence convergence approach. The result shows that the value of accuracy above the tolerance value, 93.13% for landuse interpretation and 84,21% for land parcel booundary interpretation. It means that the small format aerial photography derived from drone can be used to provide quick and accurate spatial data on paddy field land parcel identification.Intisari: Peningkatan bencana dalam sepuluh tahun terakhir memberikan peringatan kepada semua pemangku kepentingan akan potensi bahaya. Potensi risiko terhadap aset-aset lahan yang disebabkan oleh dampak bencana membutuhkan ketersediaan data spasial lahan yang cepat dan akurat yang hingga saat ini baru terpetakan seluas 65%. Penelitian ini bertujuan membangun metode interpretasi dan memetakan bidang tanah sawah menggunakan unmanned aerial vehicle (UAV). Penelitian ini menggunakan metode interpretasi visual dengan pendekatan konvergensi bukti. Hasil interpretasi menunjukkan nilai akurasi diatas nilai toleransi, 93,13% untuk interpretassi penggunaan lahan dan 84,21% untuk interpretasi batas bidang tanah. Hal ini berarti bahwa fotoudara format kecil yang dihasilkan dari pemotretan drone dapat digunakan untuk menghasilkan data spasial bidang tanah sawah secara cepat dan akurat.
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Pavlova, A. I., V. K. Kalichkin, and A. V. Kalichkin. "Creation of the digital elevation model with the use of unmanned aerial vehicle." Siberian Herald of Agricultural Science 49, no. 3 (July 23, 2019): 70–78. http://dx.doi.org/10.26898/0370-8799-2019-3-9.
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The necessary sequence of stages has been developed and the unmanned technology for creating a digital elevation model by the example of the land use of Novosibirsk region has been implemented. The technology consists of a set of stages: reconnaissance of the terrain, fi xing reference signs, satellite measurements, aerial photography fl ights, processing the results of aerial photography and the construction of digital elevation model. The technological process was signifi cantly affected by unfavorable weather conditions - low clouds, gusty wind, high air humidity. Remote sensing study with the use of unmanned aerial vehicle of the Supercam S 250 F type made it possible to create a large-scale orthophotoplan and a digital elevation model on the farm territory (M 1 : 1000). For photogrammetric processing of digital data obtained on the farm, a two-stage method of satellite determination was used. The essence of this method was to obtain a large number of satellite measurements in a static mode and further statistical processing. For statistical processing of satellite measurements, information was used on the coordinate location of two base ground stations of the Novosibirsk Region satellite network - Kochenevo and Novosibirsk. Remoteness of support points from the ground satellite station of Novosibirsk was at a distance of over 90 km. As a result of equalization calculations, the obtained average square displacement errors of the planned and high-altitude position of the support points in various test sites were under 0.02 m in the plan, and under 0.03 m by height. In the process of photogrammetric processing of the results of aerial photography with the use of unmanned aerial vehicle, the tasks of transferring the position of points on a digital image in the pixel coordinate system into the coordinate system of the area, building digital irregular (TIN, Triangulated Irregular Network) and regular (DEM, Digital Elevation Model) surface models, and based on them, textured terrain models (TTM, Textured Terrain Model) and orthophotoplans, were solved.
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Li, Xiaoxiao, and Guofan Shao. "Object-Based Land-Cover Mapping with High Resolution Aerial Photography at a County Scale in Midwestern USA." Remote Sensing 6, no. 11 (November 14, 2014): 11372–90. http://dx.doi.org/10.3390/rs61111372.
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Al‐Bakri, J. T., J. C. Taylor, and T. R. Brewer. "Monitoring land use change in the Badia transition zone in Jordan using aerial photography and satellite imagery." Geographical Journal 167, no. 3 (September 2001): 248–62. http://dx.doi.org/10.1111/1475-4959.00022.
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Arkin, Jeremy, Nicholas C. Coops, Txomin Hermosilla, Lori D. Daniels, and Andrew Plowright. "Integrated fire severity–land cover mapping using very-high-spatial-resolution aerial imagery and point clouds." International Journal of Wildland Fire 28, no. 11 (2019): 840. http://dx.doi.org/10.1071/wf19008.
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Fire severity mapping is conventionally accomplished through the interpretation of aerial photography or the analysis of moderate- to coarse-spatial-resolution pre- and post-fire satellite imagery. Although these methods are well established, there is a demand from both forest managers and fire scientists for higher-spatial-resolution fire severity maps. This study examines the utility of high-spatial-resolution post-fire imagery and digital aerial photogrammetric point clouds acquired from an unmanned aerial vehicle (UAV) to produce integrated fire severity–land cover maps. To accomplish this, a suite of spectral, structural and textural variables was extracted from the UAV-acquired data. Correlation-based feature selection was used to select subsets of variables to be included in random forest classifiers. These classifiers were then used to produce disturbance-based land cover maps at 5- and 1-m spatial resolutions. By analysing maps produced using different variables, the highest-performing spectral, structural and textural variables were identified. The maps were produced with high overall accuracies (5m, 89.5±1.4%; 1m, 85.4±1.5%), with the 1-m classification produced at slightly lower accuracies. This reduction was attributed to the inclusion of four additional classes, which increased the thematic detail enough to outweigh the differences in accuracy.
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Yang, Chenghai, James H. Everitt, and John A. Goolsby. "Mapping Giant Reed (Arundo donax) Infestations along the Texas–Mexico Portion of the Rio Grande with Aerial Photography." Invasive Plant Science and Management 4, no. 4 (December 2011): 402–10. http://dx.doi.org/10.1614/ipsm-d-10-00081.1.
Full textAbstract:
AbstractGiant reed is an invasive weed throughout the southern half of the United States, with the densest stands growing along the coastal rivers of southern California and the Rio Grande in Texas. The objective of this study was to use aerial photography to map giant reed infestations and to estimate infested areas along the Texas–Mexico portion of the Rio Grande. Aerial color-infrared photographs were taken along the Rio Grande between Brownsville and El Paso, TX, in June and July 2002. Based on the aerial photographs and ground surveys, the portion of the river from San Ygnacio to Lajitas, which has a river length of 898 km (558 mi), was found to be infested with giant reed. To estimate infested areas along both sides of the river, 65 (13.5%) of the 480 aerial photographs taken between Lajitas and San Ygnacio were randomly selected. The aerial photographs were digitized, rectified to Google Earth imagery, and then classified using maximum-likelihood classification techniques. The infested areas on both sides of the river, as well as water area and river length, from each photographic image were determined. Based on the estimates from the 65 aerial photos, the ratio of giant reed area to water area and the ratio of giant reed area to river length were calculated. The total giant reed area along the Rio Grande between Lajitas and San Ygnacio was estimated to be 5,981 ha (14,779 ac) with 3,714 ha or 62% on the U.S. side and 2,267 ha or 38% on the Mexican side. This study provides the first accurate estimates of giant reed infestations along the Texas–Mexico portion of the Rio Grande and will be useful for both land owners and government agencies for the estimation of water usage and economic loss and for the management and control of giant reed.