![]() ![]() For more details on the data provenance of this dataset, visit here and here. This dataset includes data over Canada and Mexico as part of an international, interagency collaboration with the Mexico's National Institute of Statistics and Geography (INEGI) and the Natural Resources Canada (NRCAN) Centre for Topographic Information-Sherbrook, Ottawa. The 3DEP data holdings serve as the elevation layer of The National Map, and provide foundational elevation information for earth science studies and mapping applications in the United States. Part of Alaska is available at the 1- and 1/3-arc-second resolution from IFSAR collections starting in 2010. The elevations in these DEMs represent the topographic bare-earth surface. This is a tiled collection of the 3D Elevation Program (3DEP) covering Alaska only, and is 5-meter resolution. Each of these layers are composed of the best available raster elevation data of the conterminous United States, Alaska. The vertical reference will vary in other areas. All elevation values are in meters and, over the conterminous United States, are referenced to the North American Vertical Datum of 1988 (NAVD 88). These data are distributed in geographic coordinates in units of decimal degrees, and in conformance with the North American Datum of 1983 (NAD 83). Choose Georgia State and click on 'continue' to reach the GIS data. GIS files are either ESRI Geodatabase or Shapefile format and have been compressed with WinZip. For the State of Alaska, elevation data are critical for aviation navigation and safety, natural. VRT file: AKHainesDEM2020.vrt All Files haines2020dtm01242020.tif. Multiple VRTs generally indicates there are multiple projection systems in the dataset. Software packages that incorporate GDAL can reference the data by prepending /vsicurl/ to the URL of the VRT. Seamless 3DEP data are derived from diverse source data that are processed to a common coordinate system and unit of vertical measure. Digital data and maps are provided for download and use by planners. Raster Size: 15 minute tiles: File Size: 50 - 100 megabytes. Virtual Raster Tables (VRTs) can be used to reference the entire data set. 3DEP data are updated continually as new data become available. Each of these layers consists of the best available raster elevation data of the conterminous United States, Alaska, Hawaii, territorial islands, Mexico and Canada. 3DEP data compose an elevation dataset that consists of seamless layers and a high resolution layer. Scientists and resource managers use 3DEP data for global change research, hydrologic modeling, resource monitoring, mapping and visualization, and many other applications. The State of Alaska offers 5-meter IfSAR by tiles for the entire State through their elevation portal found at USGS offers the 5-meter IfSAR data tiles, and also provides seamless post-processed elevation data at approximately 10-meter, 30-meter, and 60-meter post spacing. consistency with the IfSAR data and to keep raster file sizes. 3DEP data serve as the elevation layer of The National Map, and provide basic elevation information for Earth science studies and mapping applications in the United States. Abstract: High-resolution (5-m) elevation data available through the Alaska Statewide Digital. This is a 1 arc-second (approximately 30 m) resolution tiled collection of the 3D Elevation Program (3DEP) seamless data products. ![]()
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