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 The following is a short list of informative Web sites and reports related to the acquisition, creation, application, and delivery of digital elevation data. We hope to revise this page on a regular basis. Geospatial One-Stop 2/20/04 The USGS National Elevation Dataset (NED) Assembled by the U.S. Geological Survey, the NED is designed to provide National elevation data in a seamless form with a consistent datum, elevation unit, and projection. Data corrections were made to minimize artifacts, perform edge matching, and fill sliver areas of missing data. NED has a resolution of one arc-second (approximately 30 meters) for the conterminous United States, Hawaii, and Puerto Rico and a resolution of two arc-seconds for Alaska. 5/9/01 Airborne Laser Mapping The one-stop LIDAR reference source. 4/20/01 FEMA LIDAR Guidelines - Appendix 4B FEMA guidelines and specifications for Airborne LIght Detection and Ranging Systems. Links to the FEMA Map Modernization site and related subjects. Appendix 4B is currently under revision. 6/12/01 Topographic Change Mapping An informative NOAA site with information on the use of LIDAR technology to document topographic changes along shorelines. Many reference links as well. 3/29/01 Have You Seen the Light? An article from GeoPlace's GeoWorld site on the creation of DTMs from LIDAR for large-scale, high-accuracy mapping. 8/30/01 New Tools Produce Classic Cartographic Effects Links to an ESRI ARCUSER article on "alternatives to hillshading--illuminated contours, hachures, and point symbols--for portraying topography. These methods combine classical cartographic techniques with GIS software for greater visual impact." 7/3/01 Evaluation of Multi-Return LIDAR for Forestry Applications (PDF - 974k)is a USDA Forest Service study of to "map" the canopy, the bare earth, and many of the structural characteristics such as canopy height, volume, and basal diameter from a single flight utilizing LIDAR. 12/00 Evaluation of the Utility and Accuracy of LIDAR and IFSAR Derived Digital Elevation Models for Flood Plain Mapping (PDF - 681k) is a comparison study of those technologies conducted by the North Carolina Geographic Information and Analysis. 3/30/01 Some of the files on this page are presented in Portable Document Format (PDF); the latest version of Adobe Acrobat Reader or similar software is required to view it. Download the latest version of Acrobat Reader, free of charge. |
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