Journal articles: 'Hydrographic surveying'

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MacMahan, Jamie. "Hydrographic Surveying from Personal Watercraft." Journal of Surveying Engineering 127, no. 1 (February 2001): 12–24. http://dx.doi.org/10.1061/(asce)0733-9453(2001)127:1(12).

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Haslam, David. "The Duke of Edinburgh Lecture: International Hydrography." Journal of Navigation 46, no. 2 (May 1993): 159–73. http://dx.doi.org/10.1017/s0373463300011516.

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It is perhaps appropriate, on this the exact 187th anniversary of the death of Admiral Lord Nelson at Trafalgar and in the year in which so many celebrations have taken place to commemorate the 500th anniversary of Christopher Columbus's arrival somewhere in the West Indies, to consider the progress which has been made towards international co-operation and achievements in hydrographic surveying and nautical cartography, particularly since the formation of the International Hydrographic Bureau in 1921, and to look at the problems facing international hydrography in the immediate future.

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Saville, Jr., Thorndike, and Joseph M. Caldwell. "ACCURACY OF HYDROGRAPHIC SURVEYING IN AND NEAR THE SURF ZONE." Coastal Engineering Proceedings 1, no. 3 (January 1, 2000): 3. http://dx.doi.org/10.9753/icce.v3.3.

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The analysis and solution of most beach erosion problems are based to a significant degree on the quantitative changes in the bottom hydrography as observed in successive surveys. Critical decisions as to the dominant direction of littoral drift, the average rate of this drift, and the onshore-offshore movement of material are based largely on such hydrographic surveys. As the net changes between successive surveys are usually small compared to the area being studied, the degree of accuracy or comparability of the hydrographic surveys is of considerable importance. For instance, a net change of 100,000 cubic yards over one square mile of beach represents an average change in depth of only about 0.1 feet. Thus, it can be seen that uncompensated errors in depth measurement of as little as 0.1 feet can produce indications of significant littoral sand movement which might not exist in reality.

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Akpınar, Burak, and Nedim Onur Aykut. "Determining the Coordinates of Control Points in Hydrographic Surveying by the Precise Point Positioning Method." Journal of Navigation 70, no. 6 (May 24, 2017): 1241–52. http://dx.doi.org/10.1017/s0373463317000236.

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After Global Navigation Satellite Systems (GNSS) were first used in the field of hydrography in 1980, developments in hydrographic surveying accelerated. Survey precision in hydrography has been improved for both horizontal and vertical positioning and seafloor acoustic measurement by means of these new developments. Differential Global Positioning System (DGPS), Real Time Kinematic (RTK) and Network RTK (NRTK) techniques are the satellite-based positioning techniques that are commonly used in shallow water surveys and shoreline measurements. In line with these developments, the newer Precise Point Positioning (PPP) has been introduced. Combining precise satellite positions and clocks with dual-frequency GNSS data, PPP can provide position solutions from the centimetre to decimetre level. In this study, the coordinates of control points were determined by using the Post-Process PPP (PP-PPP) technique. Seven test points, which are the points of the Continuously Operating Reference Station - Turkey (CORS-TR) network, are selected near the shorelines within Turkey. The 24-hour data was split from one to six hours by one hour periods. Automatic Point Positioning Service (APPS) was selected to process the data. The poisoning error of the test points were given and compared with International Hydrographic Organization (IHO) S44 hydrographic survey standards.

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Barford, Megan. "D.176: Sextants, numbers, and the Hydrographic Office of the Admiralty." History of Science 55, no. 4 (July 5, 2017): 431–56. http://dx.doi.org/10.1177/0073275317712817.

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In the 1830s and 1840s, the Hydrographic Office of the British Admiralty developed and oversaw one of the major state-run surveying projects of the nineteenth century. This involved a range of instruments whose circulation was increasingly regulated. Using extant museum collections and the correspondence of those involved, this article explores how such objects can be used to discuss both bureaucratic organization at a time of expanding government and the complex issues of sociability involved in hydrographic surveying. Surveying officers worked in a context in which the propriety of property on public service was a pervasive question. Instruments might be given as gifts between officers, appropriated as recompense, absorbed as state property, and disputed between friends. The ownership, provision, and treatment of instruments in particular could be used to demonstrate an officer’s peculiar zeal or institutional neglect. To those outside the ship, what was understood as over-instrumentation became amusing spectacle. On board, their use was part of a deeply hierarchical order of work in regions of colonial and mercantile importance. In examining the relationships around these instruments of survey, the paper proposes a richer understanding of the material culture of hydrography in the early nineteenth century.

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Elsobeiey, M. "PERFORMANCE ANALYSIS OF LOW-COST SINGLE-FREQUENCY GPS RECEIVERS IN HYDROGRAPHIC SURVEYING." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W5 (October 5, 2017): 67–71. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w5-67-2017.

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The International Hydrographic Organization (IHO) has issued standards that provide the minimum requirements for different types of hydrographic surveys execution to collect data to be used to compile navigational charts. Such standards are usually updated from time to time to reflect new survey techniques and practices and must be achieved to assure both surface navigation safety and marine environment protection. Hydrographic surveys can be classified to four orders namely, special order, order 1a, order 1b, and order 2. The order of hydrographic surveys to use should be determined in accordance with the importance to the safety of navigation in the surveyed area. Typically, geodetic-grade dual-frequency GPS receivers are utilized for position determination during data collection in hydrographic surveys. However, with the evolution of high-sensitivity low-cost single-frequency receivers, it is very important to evaluate the performance of such receivers. This paper investigates the performance of low-cost single-frequency GPS receivers in hydrographic surveying applications. The main objective is to examine whether low-cost single-frequency receivers fulfil the IHO standards for hydrographic surveys. It is shown that the low-cost single-frequency receivers meet the IHO horizontal accuracy for all hydrographic surveys orders at any depth. However, the single-frequency receivers meet only order 2 requirements for vertical accuracy at depth more than or equal 100&thinsp;m.

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Hamden, Mohammad Hanif, and Ami Hassan Md Din. "A review of advancement of hydrographic surveying towards ellipsoidal referenced surveying technique." IOP Conference Series: Earth and Environmental Science 169 (July 31, 2018): 012019. http://dx.doi.org/10.1088/1755-1315/169/1/012019.

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Van Twembeke, U., A. Muls, G. W. Hein, H. Landau, G. Baustert, and K. Hehl. "Precise differential kinematic positioning for hydrographic surveying tasks." Marine Geodesy 13, no. 4 (January 1989): 253–76. http://dx.doi.org/10.1080/15210608909379631.

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Aykut, Nedim Onur, and Burak Akpınar. "Determining the dynamic draught for precise hydrographic surveying." Ocean Engineering 62 (April 2013): 38–44. http://dx.doi.org/10.1016/j.oceaneng.2013.01.024.

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El-Diasty, Mohammed, Mosbeh R. Kaloop, and Faisal Alsaaq. "Chart Datum-to-Ellipsoid Separation Model Development for Obhur Creek Using Multibeam Hydrographic Surveying." Journal of Marine Science and Engineering 10, no. 2 (February 15, 2022): 264. http://dx.doi.org/10.3390/jmse10020264.

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A traditional shore-based discrete point chart datum (CD) that represents the lowest astronomical tide (LAT) in Saudi Arabia using tide gauge data is utilized to reduce the observed depth collected from hydrographic surveying test to CD-referenced depth for producing navigation charts for maritime navigation applications. A need for developing CD in a continuous form is essential to replace the traditional discrete CD using tide gauge data. The importance of the development of CD-to-ellipsoid (WGS84) separation model is that it can be utilized by the hydrographers to develop an accurate vertical control for hydrographic surveys applications and can be utilized by the mariners to produce accurate dynamic electronic navigation charts (ENCs). In this paper, a continuous CD to WGS84 ellipsoid separation model for the Sharm Obhur area is developed using a multibeam hydrographic surveying test. It is shown that the continuous chart datum ranges from −4.920 m to −4.766 m and can be achieved with standard deviation ranges from 0.1 cm to 2.3 cm. To validate the separation model, a comparison was made with the gravimetric/oceanographic method based on the separation height developed from geoid height, the sea surface topography and LAT value (chart datum to mean sea level) at the tide gauge located in the study area. The comparison showed that the average value of the developed continuous CD to WGS84 separation model heights using multibeam hydrographic surveying agrees with the separation height estimated from gravimetric/oceanographic method.

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Bräker, Julia, Julia Hertel, Marc Briede, Thomas Thies, and Martin Semmann. "Augmented reality for crewed hydrographic surveys - How augmented reality can leverage water depth management in the port of Hamburg." International Hydrographic Review 28 (November 1, 2022): 205–11. http://dx.doi.org/10.58440/ihr-28-n10.

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For the process of hydrographic surveying, the skipper of the survey vessel needs a variety of real-time navigational and hydrographic information to navigate the vessel safely and precisely. The survey data is typically displayed on several monitors on board. As part of a research project, we are exploring the potential of augmented reality – a technology that can extend reality by overlaying it with computergenerated visualizations – to assist the skipper in hydrographic surveys. We report an overview of the technology itself, our proof of concept and several challenges we focus on to create a usable and valuable prototype system.

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Awang Ali, Awang Nasrizal, and Junaidah Ariffin. "Model Reliability Assessment: A Hydrodynamic Modeling Approach for Flood Simulation in Damansara Catchment Using InfoWorks RS." Advanced Materials Research 250-253 (May 2011): 3769–75. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.3769.

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This paper presents the flood inundation model using a hydrodynamic approach for flood simulation. A Digital Elevation Model (DEM) for Damansara Catchment was developed and integrated into the InfoWorks River Simulation (RS) program. Hydrographic surveying activity was carried out to collect existing Damansara River cross-section. The 3D flood model was calibrated using the 26th February 2006 and 15th October 2008 flooding event data. The model was validated using the flooding event on 21st March 2007. This computer simulation results produced hydrograph that indicates the capability of the model in dealing with regional flood analysis for future usage in designing structural flood measures.

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Said, N. M., M. R. Mahmud, and R. C. Hasan. "SATELLITE-DERIVED BATHYMETRY: ACCURACY ASSESSMENT ON DEPTHS DERIVATION ALGORITHM FOR SHALLOW WATER AREA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W5 (October 5, 2017): 159–64. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w5-159-2017.

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Over the years, the acquisition technique of bathymetric data has evolved from a shipborne platform to airborne and presently, utilising space-borne acquisition. The extensive development of remote sensing technology has brought in the new revolution to the hydrographic surveying. Satellite-Derived Bathymetry (SDB), a space-borne acquisition technique which derives bathymetric data from high-resolution multispectral satellite imagery for various purposes recently considered as a new promising technology in the hydrographic surveying industry. Inspiring by this latest developments, a comprehensive study was initiated by National Hydrographic Centre (NHC) and Universiti Teknologi Malaysia (UTM) to analyse SDB as a means for shallow water area acquisition. By adopting additional adjustment in calibration stage, a marginal improvement discovered on the outcomes from both Stumpf and Lyzenga algorithms where the RMSE values for the derived (predicted) depths were 1.432 meters and 1.728 meters respectively. This paper would deliberate in detail the findings from the study especially on the accuracy level and practicality of SDB over the tropical environmental setting in Malaysia.

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14

Alkan, Reha Metin. "REDUCTION OF HEAVE, PITCH AND ROLL EFFECTS IN HYDROGRAPHIC SURVEYING." Survey Review 37, no. 289 (July 2003): 208–17. http://dx.doi.org/10.1179/sre.2003.37.289.208.

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Tang, Kelvin Kang Wee, and Mohd Razali Mahmud. "The Accuracy of Satellite Derived Bathymetry in Coastal and Shallow Water Zone." International Journal of Built Environment and Sustainability 8, no. 3 (August 30, 2021): 1–8. http://dx.doi.org/10.11113/ijbes.v8.n3.681.

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Precise and accurate bathymetric measurements are conventionally acquired by means of ship-based acoustic equipment. Nevertheless, recent multispectral satellite imagery has been utilised as a substitute source to map the seabed topography which indicates new revolution in hydrographic surveying. This study assesses the satellite bathymetric depth’s accuracy based on the vertical uncertainty as stated in the Standards for Hydrographic Surveys issued by the International Hydrographic Organization. Two empirical algorithms, namely, Dierssen’s and Stumpf’s approaches have been adopted to model the seafloor topography over the coastal and shallow water at Tanjung Kupang, Malaysia. The outcomes demonstrate a decent correlation between the derived water depths and the sounding values acquired from a ship-based acoustic survey. For instance, a total of 1,215 out of the 1,367 generated water depths by Stumpf’s model have hit the minimum standard of survey in S-44. Similarly, out of the 1,367 samples from Diessen’s model, 1,211 samples have met the minimum requirement listed in the survey standard. The results demonstrate both imageries derived bathymetry models convey promising results which can be ultilised for bathymetric mapping application. Therefore, this imagery derived bathymetry can be considered as an alternative bathymetric surveying technique to supply cost-effective solution and survey data to support the Blue Economy and Sustainable Development Goals 14.

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Gray, David H. "Where has sable island been for the past 200 years?" CISM journal 46, no. 3 (October 1992): 265–75. http://dx.doi.org/10.1139/geomat-1992-0028.

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The location of Sable Island (44°N, 60°W) has been positioned by six independent surveys over the past 200 years. This paper correlates the surveys based on the limited number of common points and comments on the surveying methods that were employed and concludes that the various positions are more due to the quality of surveying than to the shifting of the island. The implications, both in terms of hydrographic charting and legal basis of sovereignty of maritime areas, are also discussed.

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Saka, M. H., T. Kavzoglu, C. Ozsamli, and R. M. Alkan. "Sub-Metre Accuracy for Stand Alone GPS Positioning in Hydrographic Surveying." Journal of Navigation 57, no. 1 (January 2004): 135–44. http://dx.doi.org/10.1017/s0373463303002571.

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The accuracy that can be achieved by a single GPS receiver in stand-alone mode is around 10 metres with SA switched off; this is not adequate for most hydrographic studies. This study aims to improve this level of accuracy using a single geodetic receiver in stand-alone mode by applying a phase smoothing algorithm. The algorithm described in this study requires that the measurements be started from a known point for initialisation. The test site selected for the study is Halic bay, Istanbul. After GPS data were collected on a geodetic point for initialisation, the receiver was moved to a hydrographic vessel and trial measurements were performed along several survey profiles. The position of the vessel was calculated at every epoch using the carrier phase smoothing algorithm. In order to analyse the accuracy of the results, a second receiver collected data on another known point on the seashore during the whole session. The position of the vessel was accurately determined using a kinematic positioning method considering the data collected by both receivers. The results produced show that an accuracy of less than a metre can be achieved using the approach considered in this study.

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Elsobeiey, Mohamed Elsayed. "Accuracy Assessment of Satellite-Based Correction Service and Virtual GNSS Reference Station for Hydrographic Surveying." Journal of Marine Science and Engineering 8, no. 7 (July 20, 2020): 542. http://dx.doi.org/10.3390/jmse8070542.

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The aim of this paper is to assess the performance of satellite-based correction service, Trimble PP-RTX, and Virtual Reference Stations (VRS) for bathymetry determination, and check how far these techniques meet the minimum standards of the International Hydrography Organization (IHO) for hydrographic surveys. To this end, a three-hour duration session was conducted at Sharm Obhur using KAU-Hydrography 1 vessel. This session includes Global Navigation Satellite System (GNSS) data at the base station using Trimble SPS855 GNSS receiver, multibeam records using Kongsberg EM 712 multibeam echo sounder, sound velocity profile using Valeport’s sound velocity profiler, Applanix POS MV measurements, and real-time PP-RTX corrections. Moreover, the VRS GNSS data was generated using Kingdom of Saudi Arabia Continuous Operation Reference Station network (KSA-CORS). It is shown that the Total Horizontal Uncertainty (THU) and Total Vertical Uncertainty (TVU) of the PP-RTX technique are 5.50 cm and 5.90 cm, respectively, which meets the IHO minimum standards for all survey orders at 95% confidence level. The THU and TVU of the VRS technique, on the other hand, are 5.75 cm and 7.05 cm at 95% confidence level, respectively. These values meet the IHO standards for all survey orders as well. Statistical analysis of the seabed surface differences showed a −0.07 cm average difference between the PP-RTX seabed surface and the reference seabed surface with a standard deviation of 3.60 cm. However, the average difference between the VRS-based seabed surface and the reference seabed surface is −0.03 cm and a standard deviation of 3.61 cm.

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Araujo, Andre A., and Nicholas Hedley. "Bathymetric data visualization – A review of current methods, practices and emerging interface opportunities." International Hydrographic Review 29, no. 2 (November 1, 2023): 150–63. http://dx.doi.org/10.58440/ihr-29-2-a29.

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Advances in 3D surveying and data processing, are encouraging the hydrographic community to consider the limitations of existing visualization methods, and the opportunities of emerging interface technologies to view bathymetric data. This paper aims to identify and document trends in the technologies and interfaces used for hydrographic visualization. First, it aims to summarize the platforms and methods currently used to visualize bathymetric data in the context of nautical cartographic production. Second, based on reported outcomes in the selected literatures, themes in the potential utility and implications of emerging tools and interfaces to improve bathymetric data visualization, are discussed.

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Gray, David H. "Bringing old mapping of Sable Island into a modern geographic reference frame." Proceedings of the Nova Scotian Institute of Science (NSIS) 48, no. 2 (May 7, 2016): 309. http://dx.doi.org/10.15273/pnsis.v48i2.6661.

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Six independent surveys over the past 250 years have located Sable Island (44°N, 60°W) in different locations. This paper correlates the surveys based on the limited number of common points and comments on the surveying methods that were employed and concludes that the various positions are more due to the quality of surveying than to the shifting of the island or to tectonic plate motion. The implications, in terms of hydrographic charting and legal basis of sovereignty of maritime areas and of the National Park Reserve, are also discussed.

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Tidey, Emily, and Christina Hulbe. "Sub-Antarctic Auckland Islands Seafloor Mapping Investigations Using Legacy Data." Geosciences 9, no. 2 (January 23, 2019): 56. http://dx.doi.org/10.3390/geosciences9020056.

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This paper demonstrates the richness of data collected for nautical charting and considers ways in which chart data can support scientific research, through a case study of two modern navigation surveys undertaken in the Auckland Islands. While legacy charts have coarser resolution, and may synthesize different epochs together into one final product, we examine how they may be used on their own and to complement more recent hydrographic surveys. We argue that the hydrographic and ancillary data, only a fraction of which appears on the final chart, also has scientific value and that the hydrographic surveying principles applied during data collection are equally relevant for all seabed mapping. While the benefits of full bottom coverage obtained by state of-the-art multibeam surveys are clear, there is much more to be discovered in legacy singlebeam datasets than what is displayed on the nautical chart alone.

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Liu, Shao Tang, Xi Rui Liu, and Fu Qin Yang. "Control Surveying and Structural Health Monitoring Applied in Large Bridge." Advanced Materials Research 639-640 (January 2013): 243–46. http://dx.doi.org/10.4028/www.scientific.net/amr.639-640.243.

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In order to ensure the safety of the bridge, Control surveying and monitoring was applied in many ways. This paper introduces the surveying and monitoring methods, analyzes the surveying accuracy, discuses the effective measures. In case study, Trimble 5700 GPS, TPS，Levels were used to perform the control surveying, and video camera, camera, georobot, three-dimensional laser scanner and other graph or image sensors were used to monitor bridge deformation. The research shows that the relative error of the control network baseline is smaller than 10-6 and the elevation accuracy is satisfied with the standard. The control survey enabled all surveying, mapping and monitoring activities to share a common geodetic reference system，provided a reliable support for the monitoring of the piers，box girders，coastal topographic details as well as hydrographic activities. And the application of modern sensors and the data acquisition technology reflected the real-time deformation conditions of bridge and provided forecasting and alarming information at any time by ways of number, curves, graph and image with high efficiency.

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Bateman, Sam. "Hydrographic surveying in the EEZ: differences and overlaps with marine scientific research." Marine Policy 29, no. 2 (March 2005): 163–74. http://dx.doi.org/10.1016/j.marpol.2004.08.011.

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Pastol, Yves. "Use of Airborne LIDAR Bathymetry for Coastal Hydrographic Surveying: The French Experience." Journal of Coastal Research 62 (March 2011): 6–18. http://dx.doi.org/10.2112/si_62_2.

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Daniel, Sylvie, Denis Hains, and Ian Church. "COMREN International School on Hydrographic Surveying - A Pan-Canadian collaborative Training Program." International Hydrographic Review 27 (May 1, 2022): 143–49. http://dx.doi.org/10.58440/ihr-27-n04.

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The Canadian Ocean Mapping Research and Education Network (COMREN) aims to develop research activities, achieve technology transfer to industry, and develop and run educational programs. The International School on Hydrographic Surveying (ISHS) is the first training program proposed by the network. It was designed to provide participants with a multi-disciplinary training experience in close interaction with high-level scientists, professionals, and stakeholders from the hydrospatial environment. The 2021 edition of the school took place from October 25 to 29 at Université Laval with a set-up compliant with the pandemic conditions. This note highlights the main facts and outcomes about this training.

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Devote, Basil Daniel. "Error Analysis in Multibeam Hydrographic Survey System." South African Journal of Geomatics 13, no. 2 (July 10, 2024): 236–50. http://dx.doi.org/10.4314/sajg.v13i2.2.

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Hydrographic surveying involves the integration of a depth-measuring sonar (Sound navigation and ranging) with a positioning system or Global Navigation Satellite System (GNSS); a motion sensor or Inertia Measuring Unit (IMU); and an azimuth sensor (gyroscope). The various sensors acquire data in terms of their respective reference frame and time. The challenge lies in integrating the various sensor frames and time, and in transforming the vessel frame coordinate system into a terrestrial reference frame. The integration of the various sensor frames and time is necessary to minimize systematic errors in the bathymetric data that result from latency, and calibration uncertainty. The focus of this research is to model the systematic bias associated with the integration of the various sensor reference frames. In so doing, the quality of the acquired data is enhanced, and error budgeting and uncertainty prediction can be effectively carried out during the preparation, acquisition, and processing stages of the bathymetric exercise. As such, the required project specification and hydrographic standards, as defined by the International Hydrographic Organization (IHO), are met.

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Cannon, M. Elizabeth. "The contribution of gps to the information society." CISM journal 44, no. 3 (October 1990): 225–31. http://dx.doi.org/10.1139/geomat-1990-0023.

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The Global Positioning System (GPS) is rapidly becoming an important tool in the surveying community. It is currently being used in a number of applications, ranging from cadastral control point establishment to hydrographic surveying. The emphasis of this paper is on the contribution of GPS to the information society. Fundamental aspects of GPS are presented and the current status of the system is outlined. The advantages of using GPS in the collection of georeferenced data and specifically its impact on Geographic Information Systems are described. Issues such as the establishment of an Active Control System, the development of new surveying techniques and the integration of GPS with other sensors for cost-effective data gathering are addressed. The future role of GPS in the collection of georeferenced information and a discussion of new and exciting opportunities for surveyors being created by GPS, concludes the paper.

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Lodwick, G. D., and S. H. Paine. "SATELLITE REMOTE SENSING IN SURVEYING PRESENT OPPORTUNITIES, FUTURE POSSIBILITIES." Canadian Surveyor 40, no. 3 (September 1986): 315–26. http://dx.doi.org/10.1139/tcs-1986-0025.

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Of all the areas of the earth sciences affected by satellite remote sensing, the surveying profession has been one of the last to take advantage of its unique features. This is due in part to: resolution limitations of Landsat 1, 2 and 3, difficulties in registration and positioning of the imagery, technical constraints in handling vast quantities of digital data, and the excellent methods currently available for the production of cartographic products. Nevertheless, satellite remote sensing has now emerged as a complementary procedure to many existing techniques utilized in surveying and mapping. Already, Landsat is being used for topographic mapping, hydrographic surveying and resource mapping purposes. However, with the improved resolution of Landsat 4, the potential of stereoscopic coverage with the SPOT satellites and present developments in computer processing and data manipulation, satellite remote sensing in the next decade will emerge as an indispensable tool for mapping and cartography.

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Lee, Jin Duk, Jae Bin Lee, and Hyun Ho Kim. "Development of Hydrographic Dredging Surveying and Construction Management System Based on Grab Dredger." Journal of Korean Society for Geospatial Information System 21, no. 4 (December 31, 2013): 3–12. http://dx.doi.org/10.7319/kogsis.2013.21.4.003.

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Shi, Lei, Jindong Wang, Edward Myers, and Lijuan Huang. "Development and Use of Tide Models in Alaska Supporting VDatum and Hydrographic Surveying." Journal of Marine Science and Engineering 2, no. 1 (March 10, 2014): 171–93. http://dx.doi.org/10.3390/jmse2010171.

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Kim, Jin Soo. "Calibration of Hydrographic Survey Multibeam System Using Terrestrial Laser Scanning and TS Surveying." Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography 31, no. 3 (June 30, 2013): 199–207. http://dx.doi.org/10.7848/ksgpc.2013.31.3.199.

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Scalco, Patricia Andréia Paiola, Andrea Lopes Iescheck, Iran Carlos Stalliviere Corrêa, Fernando Comerlato Scottá, Rafael Mastracusa de Oliveira, and Ricardo Augusto Lengler Franchini. "VALIDATION OF THE DIGITAL ELEVATION MODEL (SRTM) WITH GNSS SURVEYING APPLIED TO THE MIRIM LAGOON HYDROGRAPHIC BASIN." Boletim de Ciências Geodésicas 24, no. 3 (August 2018): 407–25. http://dx.doi.org/10.1590/s1982-21702018000300026.

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Abstract Between 2013 and 2014, a kinematic positioning based on the Global Navigation Satellite System (GNSS) was carried out for this research work. This GNSS survey resulted in 275916 points with tridimensional coordinates in the cross-border basin area of 58205 km2 called Mirim Lagoon Hydrographic Basin, located in south of Rio Grande do Sul (Brazil) and west of Uruguay. This study aims at showing the methodology firstly and, furthermore, results regarding the validation of the vertical accuracy of the DEM SRTM through kinematic positioning by GNSS, in the Mirim Lagoon Hydrographic Basin region. Also, the GNSS surveying data was post-processed with the Precise Point Positioning (PPP) method, and the ellipsoidal height was converted into orthometric height through the software INTPT geoid. During this study, the geopotential model (EGM96) was used to transform altitude differences between two countries, Brazil and Uruguay. Results showed that the vertical mean absolute error of the DEM SRTM vary from 0.07 m to ± 9.9m with average of -0.28m. This vertical accuracy is better than the absolute vertical accuracy value of ±16m published in the SRTM data specification and validates the DEM SRTM.

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Doig, J. E., D. E. Woolnough, D. F. Woolnough, and Demitris Delikaraoglou. "Book Reviews." Canadian Surveyor 40, no. 2 (June 1986): 200–204. http://dx.doi.org/10.1139/tcs-1986-0018.

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In August 1985 Canadian hydrographers broke new ground by being the first to use airborne laser scanning techniques to locate and survey shipping channels through parts of the southern route of the Northwest Passage. This survey is a landmark event in hydrographic surveying as it signals the first time that an active airborne sensor was used for chartmaking purposes. Laser soundings were acquired in two of the highest priority areas and the processed results will be used in the compilation of new nautical charts of these two areas.

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Casey, M. J., and J. Vosburgh Terra. "CHARTMAKING WITH LARSEN." Canadian Surveyor 40, no. 3 (September 1986): 251–60. http://dx.doi.org/10.1139/tcs-1986-0020.

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In August 1985 Canadian hydrographers broke new ground by being the first to use airborne laser scanning techniques to locate and survey shipping channels through parts of the southern route of the Northwest Passage. This survey is a landmark event in hydrographic surveying as it signals the first time that an active airborne sensor was used for chartmaking purposes. Laser soundings were acquired in two of the highest priority areas and the processed results will be used in the compilation of new nautical charts of these two areas.

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Carroll, Alan. "Obituary." Polar Record 43, no. 3 (July 2007): 287–88. http://dx.doi.org/10.1017/s0032247407006390.

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Victor Aloysius Jean-Baptiste Marchesi was born in London on 25 January 1914 and was educated at St. Joseph's in Norwood before joining the Merchant Navy. He later served fifteen months as fourth mate on RRS Discovery in 1936–7. He returned to a country preparing for the possibility of war, and joined the Royal Navy as a Sub-Lieutenant specialising in hydrographic survey. While serving as First Lieutenant on HMS Franklin surveying waters off southeast England in 1943, he received a signal requesting him to report to Lieutenant Commander Jimmy Marr at the Admiralty.

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Jia, Gui Xi, Hong Chao Dong, Dan Dan He, and Hong Da Zhang. "Application of Artificial Potential Fields in the Hydrographic Measurement Control System." Applied Mechanics and Materials 457-458 (October 2013): 1288–93. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.1288.

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This paper describes a new navigational algorithm that combines Artificial Potential Fields with PID controller to realize accurate channel survey, automatic obstacle avoiding, optimal route search et al. A set course can be obtained through this new algorithm and the steering of the unmanned survey ship will be worked out by closed-loop control. In test system, the location of the ship is obtained by GPS, and the error of electric steering gear angle controls PWM pulse signal, which drives servo motor by power amplifying device, thus making the electric steering gear to turn as expected. Communication between upper and lower computer is realized by C language and serial port communication, so as to get parameter information and track images of the ship in a real-time manner. The result shows that the new navigational algorithm more efficient and precise, and can be widely used in fairway surveying engineering.

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El-Rabbany, Ahmed. "Assessment of Hydrographic Data Uncertainty for Seamless Reference Surface." Journal of Navigation 59, no. 2 (April 6, 2006): 213–20. http://dx.doi.org/10.1017/s0373463306003729.

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The development of a seamless vertical reference surface is accompanied by a number of challenges pertinent to the availability, volume and uncertainty of bathymetric and topographic data. Data uncertainty, which is by far the most difficult to deal with, is attributed to various sources of errors including those of geodetic and hydrographic origin. The uncertainties in the geodetic measurements originate mainly from the limitations in the geodetic technique employed, i.e. terrestrial or space. Old nautical charts and topographic maps were based on terrestrial techniques, which are far less accurate than modern space techniques. In addition, the distribution of the positioning uncertainty is not expected to follow a consistent pattern across the chart (map). This is mainly due to the inconsistent datum distortion as well as the discrepancies in the measuring techniques in the subsequent chart (map) versions. The existing paper (and digitized) charts in many areas of the world were also based on old hydrographic surveying methods, for example the lead-line, which are far less accurate than modern techniques such as multibeam echo-sounding surveys. This creates inconsistent depth uncertainty across the chart. As uncertainties are propagated into the estimated transformation parameters, estimated positions and their covariance matrix, it is of utmost importance that they are properly modelled. This paper addresses the issue of uncertainty in hydrographic data and suggests ways to account for it.

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Prasanna, Herath Mudiyanselage Indika, Malavige Don Eranda Kanchana Gunathilaka, and Duminda Ranganath Welikanna. "Development of a Unified Vertical Reference Framework for Land and Hydrographic Surveying in Sri Lanka." Marine Geodesy 44, no. 3 (April 23, 2021): 238–56. http://dx.doi.org/10.1080/01490419.2021.1902889.

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Munir, Sarfraz, Muhammad Armaghan, and Arsalan Babrus. "An Integrated Approach to Hydrographic Surveying of Large Reservoirs—Application to Tarbela Reservoir in Pakistan." Open Journal of Modern Hydrology 04, no. 04 (2014): 156–63. http://dx.doi.org/10.4236/ojmh.2014.44015.

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Collier, Wayne M., and H. H. Shih. "6.6.3 Meeting the Needs of Hydrographic Surveying: A Case Study of the Requirements Development Process." INCOSE International Symposium 13, no. 1 (July 2003): 1007–15. http://dx.doi.org/10.1002/j.2334-5837.2003.tb02678.x.

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Prasanna, H. M. I. "FACULTY OF GEOMATICS AS THE FOCAL POINT IN GEOMATICS EDUCATION IN SRI LANKA." ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences X-5/W1-2023 (May 23, 2023): 51–57. http://dx.doi.org/10.5194/isprs-annals-x-5-w1-2023-51-2023.

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Abstract. The Faculty of Geomatics is one of the nine faculties of the Sabaragamuwa University of Sri Lanka. It offers high quality geomatics related degree programmes, and consists of a well-qualified staff and latest technological resources. It delivers highly job oriented programmes and the curriculums of these programmes have been developed to meet various national and international standards and the requirements of professional bodies. As the first time in the history of the Sri Lankan university system, the BSc in Surveying Sciences Degree Programme was introduced by the Faculty of Geomatics established in 2004. This was an essential requirement for the country due to the high demand of surveying industry. Throughout the past decades it is being greatly developed both in infrastructure and human resources. Presently, the faculty has a student population of about 500 with the aim of producing about 150 graduates annually. Geomatics graduates have a variety of rewarding local and global employment prospects as land surveyors, land administrators, site managers, or site engineers in both the public and private sectors, including cadastral, mining, hydrographic surveying, and any other remote sensing and GIS-related disciplines. Graduates with knowledge in the geospatial stream could work as GIS analysts, image analysts, image interpreters, and in other positions in the business. Graduates of the program can take on useful tasks in their field with ease.

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Kong, Seong-Kyu, Jin-Kwon Kim, and Moon-Bo Shim. "A Study on Assessment of Depth Data from Hydrographic Surveying Using MBES around South Sea of Samcheonpo." Journal of the Korean Society of Marine Engineering 34, no. 4 (May 31, 2010): 560–66. http://dx.doi.org/10.5916/jkosme.2010.34.4.560.

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Matheen, Nashwan, Mitchell D. Harley, Ian L.Turner, Joshua A. Simmons, and Mandi Thran. "DO WE NEED PRE-STORM SURVEYED BATHYMETRY FOR OPERATIONAL EROSION FORECASTING? EVALUATION OF REPRESENTATIVE AND SYNTHETIC BATHYMETRY ALTERNATIVES." Coastal Engineering Proceedings, no. 36v (December 28, 2020): 13. http://dx.doi.org/10.9753/icce.v36v.sediment.13.

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Immediate pre-storm bathymetry is a key input required for numerical models used in coastal hazard Early Warning Systems. However, the expense and challenging nature of hydrographic surveying means that the availability of high-quality data is extremely rare. This study evaluates the extent to which synthetic and representative bathymetry alternatives can be used to obtain reliable predictions of storm induced sub-aerial erosion using the XBeach coastal erosion numerical model. Multiple storm events at 2 contrasting sites are modelled using 6 bathymetry scenarios including pre-storm surveyed bathymetries, an average bathymetry, and Dean profiles. The output is analysed to evaluate the skill of XBeach erosion predictions as a function of the bathymetry used.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/bE3aXVXxZqQ

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Yang, F., S. Liu, C. Qin, K. Zhang, X. Cui, and J. Sun. "ESTABLISHMENT AND PRACTICE OF UNDERGRADUATE EDUCATION SYSTEM FOR MARINE SURVEYING AND MAPPING IN THE NEW STAGE." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-5/W1-2023 (May 24, 2023): 53–58. http://dx.doi.org/10.5194/isprs-archives-xlviii-5-w1-2023-53-2023.

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Abstract. In 2012, China announced its national strategy of building marine power. With the booming of marine development activity, the demand for marine surveying and mapping has increased sharply. However, education for the discipline lagged far behind the growth in demand. For a long time, education in the marine surveying and mapping discipline has faced two problems. First, the education content is mainly for military purposes, and there is little content about civilian use. Second, the education content is outdated and is far from the frontier science and engineering practice. To address these problems, Shandong University of Science and Technology has been working on the education reformation of the marine surveying and mapping discipline for more than a decade. By cooperating with our education partners from the military college, the universities, and the enterprises in maritime industries, we deeply analyzed the booming need in the marine survey and mapping field, and clarified the connotation and characteristics of the discipline in the new era. The discipline roots in the geodesy discipline, but is also deeply connected with oceanography, electromagnetics, and underwater acoustic. Moreover, it serves the national marine strategy and coastal economic development. Thus, it is an interdisciplinary emphasizing practicality and innovation. To this end, under the framework of military-civilian cooperation and industry-education integration, we establish an education alliance with participants from marine institutes, universities, industries, and users. Based on the close collaboration within the alliance, we built a new education model for undergraduate students in the marine surveying and mapping discipline. During the last decade, more than 3000 undergraduate students have been educated to fill the needs of employers relative to the marine economy. Moreover, more than 500 students obtained the qualifications as international hydrographic surveyors and cartographers, and they make worthwhile contributions to the national marine strategy and marine economic development.

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Lämmle, Luca, Archimedes Perez Filho, Carlo Donadio, Michele Arienzo, Luciano Ferrara, Cleber de J. Santos, and André O. Souza. "Anthropogenic Pressure on Hydrographic Basin and Coastal Erosion in the Delta of Paraíba do Sul River, Southeast Brazil." Journal of Marine Science and Engineering 10, no. 11 (October 26, 2022): 1585. http://dx.doi.org/10.3390/jmse10111585.

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Coastal erosion affects several beaches worldwide in association with natural and human pressures. In recent decades, the coastland located on the Paraíba do Sul River mouth has been recognized as one of the main areas that suffer from this geomorphological dynamic. Furthermore, the scientific literature, even if scarce, has pointed out that these dynamics are causing negative socio-environmental responses and making the area less resilient. In the last few decades, hundreds of homes and other urban structures have become debris due to erosion caused by sea ingression, triggered by the coupling of environmental processes and dynamics occurring at different spatial and temporal scales. Thus, the present research aimed to analyze how the anthropic changes carried out in the Paraíba do Sul hydrographic basin are related to the intense coastal erosion at the mouth. Variations in fluvial–marine hydrosedimentary dynamics triggered this due to the construction of dams to supply large cities and for agricultural purposes. Water and sediment samples were collected and analyzed in different sectors of the main channel and on the adjacent coast, mapping land use in the basin area and surveying socioeconomic data. The results suggest that human pressures on the hydrographic basin during the last century are directly associated with the imbalance of the environmental system and, consequently, the progression of coastal erosion on the Paraíba do Sul delta shoreline.

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Studds, Robert F. A. "COAST AND GEODETIC SURVEY DATA - AN AID TO THE COASTAL ENGINEER." Coastal Engineering Proceedings 1, no. 1 (May 12, 2010): 11. http://dx.doi.org/10.9753/icce.v1.11.

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In its long career of surveying and chartering the coastal waters of the United States and possessions, a career which dates back to the early part of the nineteenth century, the work of the Coast and Geodetic Survey has been associated with the problems of the coastal engineer. Its successive hydrographic and topographic surveys of the coastal regions furnish basic data for the study of changes in the coastline and adjacent underwater topography and the means to arrest these changes; its tide and current surveys provide the fundamental data necessary in the design of waterfront structures and in harbor improvement; and its geodetic control surveys provide an accurate base for the preliminary study and final construction plans for large-scale improvement projects. To a lesser extent the geomagnetic and seismologic data of the Bureau have also been used by the coastal engineer.

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Grządziel, Artur, and Mariusz Wąż. "Estimation of Effective Swath Width for Dual-Head Multibeam Echosounder." Annual of Navigation 23, no. 1 (December 1, 2016): 173–83. http://dx.doi.org/10.1515/aon-2016-0012.

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Abstract Many surveying companies and maritime institutions are now using multibeam systems for their operations, either offshore or in coastal and inland waters. Since the time the first multibeam echosounder appeared (late 1970s) the technology has advanced enormously. Modern systems now boast far greater angular coverage (typically 120°-150°) and form hundreds of beams. Dual-head multibeam systems can potentially cover the entire sector (180°) underneath the ship. However surveyors must be aware that the outer beams of these acoustic systems return the most errors causing that the effective swath width is shorter than what the manufacturers declare. The paper presents the methods of estimating of effective (usable) swath width of dual-head multibeam echosounder EM 3002D. Results of the hydrographic survey performed by the polish navy survey ship ORP ‘Arctowski’ have been showed in the article.

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Furness, Ron, and Lysandros Tsoulos. "ICA contribution to the development of international standards of competence for nautical cartographers." Proceedings of the ICA 1 (May 16, 2018): 1–6. http://dx.doi.org/10.5194/ica-proc-1-41-2018.

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All professions face challenges as how best to ensure the achievement and continuance of the highest standards as they seek to determine and promulgate best practices. In the essentially linked professions of hydrographic surveying and nautical cartography these challenges become immediately international in their impacts and require close cooperation between the professional bodies representing surveyors, hydrographers and cartographers. The Standards of Competence for Nautical Cartographers are known in short form as S-8 and they describe the minimum required competencies for nautical cartographers. They indicate the minimum degree of knowledge and experience considered necessary for nautical cartographers and provide a set of programme outlines against which the FIG/IHO/ICA International Board on Standards of Competence for Hydrographic Surveyors and Nautical Cartographers may evaluate programmes submitted for recognition. The Standards recognize two levels of competence: Cate- gory A and Category B. In nautical charting communities, Category A programmes offer levels of comprehensive and broad-based knowledge in all aspects of the theory and practice of nautical cartography. Category B programmes provide a level of practical comprehension, along with the essential theoretical background, necessary for individuals to carry out the various nautical cartography tasks. The Standards have recently undergone complete review and should be ratified during 2017/18. This paper aims to bring the existence and aims of the Standards to the wider notice of ICA members and to describe the philosophy and aims of the review in meeting the professional competency needs of the nautical cartographic community.

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Kogelbauer, I., and W. Loiskandl. "Characterization of sediment layer composition in a shallow lake: from open water zones to reed belt areas." Hydrology and Earth System Sciences 19, no. 3 (March 19, 2015): 1427–38. http://dx.doi.org/10.5194/hess-19-1427-2015.

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Abstract. Lake sediment characterization, a prerequisite for the vulnerability assessment of lake ecosystems, demands reliable in situ methods for the characterization of the sediment layer composition. A unified characterization of lake sediments within lake ecotopes (open water, open water patches within the reed, and the reed) is still a challenge. Each ecotope is covered by different classical scientific disciplines (hydrography and terrestrial remote sensing to soil physics) with their specific characterization methods. Recently, a complementary tool that bridges the gap between land and hydrographic surveying methods was introduced. It is a non-acoustic device that combines two soil physical sensors (a capacitive sensor and a cone penetrometer) and GNSS-positioning in a measuring system (CSPS). The CSPS enables rapid in situ delineation of water–mud–consolidated lakebed interfaces. The system was successfully applied across ecotopes at the Neusiedler See, a well-mixed shallow lake rich in fine-grained sediments. The geo-referenced vertical CSPS profiles show ecotope-specific layer composition. The effects of wind-induced turbidity, particle size, and electrical conductivity were analysed. The water–mud interface was precisely delineated at the open water due to a persistent high water content gradient, equivalent to a lutocline. The penetration resistance (PR) for open water showed either a shallow and highly compacted consolidated lakebed or a consolidated lakebed with a partially compacted layer above, while in the reed the PR smoothly increased until reaching the deepest penetration depths.

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Kogelbauer, I., and W. Loiskandl. "Characterization of sediment layer composition in a shallow lake: from open water zones to reed belt areas." Hydrology and Earth System Sciences Discussions 11, no. 11 (November 13, 2014): 12627–57. http://dx.doi.org/10.5194/hessd-11-12627-2014.

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Abstract. Lake sediment characterization, a pre-requirement for the vulnerability assessment of lake ecosystems, demands reliable in situ methods for the characterization of the sediment layer composition. A unified characterization of lake sediments within different lake ecotopes (open water, open water patches within the reed, and the reed) is still a challenge. Each ecotope is covered by different classical scientific disciplines (hydrography and terrestrial remote sensing to soil physics) with their specific characterization methods. However, a complementary tool that bridges the gap between land- and hydrographic surveying methods is still missing. Therefore a combination of soil physical sensors (a capacitive sensor and a cone penetrometer) in a measuring system (CSPS) was introduced. CSPS is a non-acoustic device for the rapid in situ delineation of water-mud-consolidated lakebed interfaces. The system was successfully applied across the different ecotopes at the Neusiedler See, a well-mixed shallow lake rich in fine-grained sediments. The geo-referenced vertical CSPS profiles show ecotope-specific layer composition. The effect of wind induced turbidity, particle size, and electrical conductivity were analysed. The water–mud interface was precisely delineated at the open water due to a persistent high water content gradient, equivalent to a lutocline. The penetration resistance for open water showed either a shallow and highly-compacted consolidated lakebed or a consolidated lakebed with a partially compacted layer above; while in the reed the penetration resistance smoothly increased until reaching the deepest penetration depths.

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Journal articles on the topic 'Hydrographic surveying'

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