Digital Elevation Data

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Digital Elevation Data

WhiteStar's Digital Elevation Data is based on the USGS National Elevation Database 30 meter grid. Elevation data are available in grid or vector form and can projected into user-specified coordinate systems, making them ideal for adding elevation contours to maps and orthophotos. Digital Elevation Models can be integrated with WhiteStar's Public Land Survey, Texas Land Survey, and Enhanced Culture Databases.
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Data Source WhiteStar's Digital Elevation Models (DEM) are based on the USGS National Elevation Database (NED) 30 meter grid. Enhancement WhiteStar has processed the data to remove banding artifacts and edge-match adjoining DEMs. Elevations are available in seamless gridded form or as vectors contoured to user specifications. WhiteStar uses ESRI GIS software to assign z-values and label contour lines. All elevation data can be reprojected into user-specified coordinate systems. Content Digital Elevation Data are delivered in grid format (30 meter spacing) or in vector format (contour lines and labels). Format Digital Elevation Models are currently available in the following formats:

	ArcGIS AutoCAD GeoGraphix Kingdom Landmark MapInfo Petra Surfer	DEM grid or Shape Files (contours) DXF, DWG Zmap Plus DXF/DWG Landmark ASCII DEM grid or Tab files (contours) Zmap Plus DEM grid

Coverage Nationwide coverage (continental US, Alaska, Hawaii, Puerto Rico), available by 7.5' quadrangle or 1 degree block. Application Land mapping, oil and gas exploration, pipeline mapping, agriculture, forestry, transportation and other government functions.



Digital Elevation Data used to create contoured shaded relief map.

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