Topic
Nautical chart
About: Nautical chart is a research topic. Over the lifetime, 415 publications have been published within this topic receiving 1656 citations. The topic is also known as: navigation chart & maritime map.
Papers published on a yearly basis
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Papers
TL;DR: The Compact Hydrographic Airborne Rapid Total Survey (CHARTS) system as discussed by the authors is the U.S. Naval Oceanographic Office program name for an Optech, Inc. SHOALS 3000T20-E. CHARTS comprises a 3 kHz bathymetric lidar, a 20 kHz topographic lidar and a DuncanTech DT4000 high-resolution digital camera.
Abstract: Airborne lidar bathymetry technology has been used since the 1980s to provide detailed maps of seafloor elevation to shallow waters. The state-of-the-art in airborne coastal mapping and charting technology is the Compact Hydrographic Airborne Rapid Total Survey (CHARTS) system. CHARTS is the U.S. Naval Oceanographic Office program name for an Optech, Inc. SHOALS 3000T20-E. CHARTS comprises a 3 kHz bathymetric lidar, a 20 kHz topographic lidar, a DuncanTech DT4000 high-resolution digital camera, and a Compact Airborne Spectrographic Imager (CASI)-1500. The integrated sensor suite collects lidar bathymetry, lidar topography, RGB (red-green-blue) imagery, and hyperspectral imagery. Beyond these products, the diffuse attenuation coefficient and seafloor reflectance at multiple wavelengths are estimated by combining information obtained from the bathymetric lidar waveform and the hyperspectral imagery. The Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) specified development of the CHARTS system and currently manages its operations for the U.S. Department of Defense. JALBTCX is the leader in the field of airborne lidar and integrated technologies for coastal mapping and charting. CHARTS data collection rate of 21 square nautical miles per survey hour enables rapid completion of large nautical charting work for the U.S. Naval Oceanographic Office. CHARTS is also used by the U.S. Army Corps of Engineers National Coastal Mapping Program to collect engineering scale data for the entire U.S. coastline. It is concluded that airborne lidar and integrated technologies have proven useful in providing the requisite data for nautical charting, coastal zone management, and riverine hydraulic modeling.
104 citations
1 Jan 1981
TL;DR: After the Conference in London, the International Hydrographic Bureau (IHB) was founded as an international intergovernmental organization with its residence in Monaco.
Abstract: International conferences on hydrography (Washington, 1899; St. Petersburg, 1912; London, 1919) were the predecessors of the creation of the International Hydrographic Organization. After the Conference in London, the International Hydrographic Bureau (IHB) was founded as an international intergovernmental organization with its residence in Monaco. At that time, 19 states were members.
83 citations
TL;DR: Canadian Hydrographic Service (CHS) is exploring remote sensing techniques to assist with the improvement of Canadian navigational charts, and optical Satellite-Derived Bathymetry (SDB) is of particular interest due to its ability to supplement depths derived from traditional hydrographic surveys.
Abstract: Approximately 1000 Canadian Hydrographic Service (CHS) charts cover Canada’s oceans and navigable waters. Many charts use information collected with techniques that predate the more advanced technologies available to Hydrographic Offices (HOs) today. Furthermore, gaps in survey data, particularly in the Canadian Arctic where only 6% of waters are surveyed to modern standards, are also problematic. Through a Canadian Space Agency (CSA) Government Related Initiatives Program (GRIP) project, CHS is exploring remote sensing techniques to assist with the improvement of Canadian navigational charts. Projects exploring optical/Synthetic Aperture Radar (SAR) shoreline extraction and change detection, as well as optical Satellite-Derived Bathymetry (SDB), are currently underway. This paper focuses on SDB extracted from high-resolution optical imagery, highlighting current results as well as the challenges and opportunities CHS will encounter when implementing SDB within its operational chart production process. SDB is of particular interest to CHS due to its ability to supplement depths derived from traditional hydrographic surveys. This is of great importance in shallow and/or remote Canadian waters where achieving wide-area depth coverage through traditional surveys is costly, time-consuming and a safety risk to survey operators. With an accuracy of around 1 m, SDB could be used by CHS to fill gaps in survey data and to provide valuable information in dynamic areas.
70 citations
TL;DR: In this paper, the authors describe the development and testing of a procedure using publicly available, multispectral satellite imagery to map and portray shallow-water bathymetry in a GIS environment for three study sites: Northeast United States, Nigeria, and Belize.
Abstract: National hydrographic offices need a better means of assessing the adequacy of existing nautical charts in order to plan and prioritize future hydrographic surveys. The ability to derive bathymetry from multispectral satellite imagery is a topic that has received considerable attention in scientific literature. However, published studies have not addressed the ability of satellite-derived bathymetry to meet specific hydrographic survey requirements. Specifically, the bathymetry needs to be referenced to a chart datum and statistical uncertainty estimates of the bathymetry should be provided. Ideally, the procedure should be based on readily-available, low-cost software, tools, and data. This paper describes the development and testing of a procedure using publicly-available, multispectral satellite imagery to map and portray shallow-water bathymetry in a GIS environment for three study sites: Northeast United States, Nigeria, and Belize. Landsat imagery and published algorithms were used to derive estimat...
65 citations
TL;DR: In this paper, the uncertainty of NGS' LIDAR-derived shoreline is assessed using an empirical (ground-based) approach and a stochastic (MSE) approach.
Abstract: The National Oceanic and Atmospheric Administration's (NOAA) National Geodetic Survey (NGS) is mandated to map the national shoreline, which is depicted on NOAA nautical charts, serves as an important source in determining territorial limits, and is widely used in various coastal science and management applications. The National Geodetic Survey's primary method of mapping the national shoreline is through stereo compilation from tide-coordinated aerial photography. However, over the past decade, NGS has conducted several phases of research to develop, test, and refine light detection and ranging (LIDAR)–based shoreline mapping procedures. Although important, reliable estimates of uncertainty of these products have, unfortunately, lagged behind in development. We attempt here to outline possible solutions to this lack. Specifically, this study presents and compares two new methods of assessing the uncertainty of NGS' LIDAR-derived shoreline: an empirical (ground-based) approach and a stochastic (M...
47 citations
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Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 4 |
| 2024 | 8 |
| 2023 | 13 |
| 2022 | 19 |
| 2021 | 8 |
| 2020 | 18 |