USGS SDTS Digital Elevation Models (DEMS)
Resolution: 10 meter Projection: UTM, Lat/Long, State Plane Datum: NAD 27, 83, WGS 84 Format: Various Dates: 2001 - present Email: info@mapmart.com
or call 303-759-5050 Option 2
Purchase by custom area
Purchase an entire state
Digital Elevation Models (DEMs) are digital files consisting of points of elevations, sampled systematically at equally spaced intervals. MapMart sells DEMs in the following formats: USGS DEM, Vertical Mapper GRD, DXF Mesh, GeoTIFF, ASCII XYZ, Arc ASCII Grid, RockWorks, Terragen, and Surfer Grid (Binary or ASCII). Some of these formats are available for immediate download by quads or by seamless custom area upon submittal of credit card, others can be generated at additional cost.
The default projection is UTM for 7.5' DEMs (the majority being in NAD 27) and Latitude/Longitude WGS 72 for 3 arc second DEMs with coordinates being in decimal degrees. Texture Maps can also be purchased with each DEM.
| 10 Meter | 7.5 minute (7x9 miles) | DEM and Other Formats - $5/quad
SDTS - Free | | 30 Meter | 7.5 minute (7x9 miles) | DEM and Other Formats - $5/quad
SDTS - Free | | 3 arc second | 27°x1° (108x70 miles) | All formats - $5/quad |
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