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Digital
Elevation Models (DEMs)
| Digital elevation
model (DEM) data are arrays of regularly spaced elevation
values referenced horizontally either to a Universal
Transverse Mercator (UTM) projection or to a geographic
coordinate system. The grid cells are spaced at regular
intervals along south to north profiles that are ordered from
west to east. The U.S. Geological Survey (USGS) produces five
primary types of elevation data: 7.5-minute DEM, 30-minute
DEM, 1-degree DEM, 7.5-minute Alaska DEM, and 15-minute Alaska
DEM. |
These 10 meter, 7.5'
DEMs are the latest from USGS.
We do not have quad specific
metadata for these files but to learn more about DEMs go to the USGS
DEM page
|
Projection:
Units:
Zone:
Datum:
|
UTM
METERS
15,16,17
NAD27 or NAD83 |
Download
DEMs
These 30 meter, 7.5'
DEMs are ArcInfo grid files that have been exported.
|
Projection:
Units:
Zone:
Datum:
|
UTM
METERS
15,16,17
NAD27 or NAD83 |
Download
DEMs
|
