Digital Elevation Models
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Complete Coverage of the Continental US in 30 or 60 Meter resolution
Created using the latest elevation (10 / 30 Meter) data available
Created using the latest release level (ODB Version 1 / 2) data available
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Have all voided and slivered areas filled
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Made as rectangular data sets to be compatible with our
ChartTiff Geo's and GeoLite's
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File names compatible with USGS DRG Quad file names
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Horizontal Resolution
30 Meter resolution for Continental US
(Also known as 1 Arc Second Resolution)
60 Meter resolution for Continental US
(Also known as 2 Arc Second Resolution)
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Vertical Resolution: Decimal or whole units of meters or feet
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Vertical Datum: 1929 (NGVD 29)
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USGS DEM (Digital Elevation Model) format documentation:
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Individual Quads available in:
USGS Standard DEM file format
GeoTIFF Format, includes ".tfw" world file
ESRI Grid Float Format
PLS-CADD ASCII Text, X,Y,Z format
XYZ text file format specifically for PLS CADD Software
ASCII Text, X,Y,Z format
XYZ text file format is a simple text format
where each elevation point is described by x, y, and z coordinates.
The x value defines the east/west coordinate,
y defines the north/south coordinate, and
z defines the elevation.
User can select Tab, Comma or Space delimited file.
The XYZ text format does not contain any header information:
x1,y1,z1
x2,y2,z2
x3,y3,z3
.....
xn,yn,zn
C Tech File Format
GMF and EFF files, directly read by C Tech Software
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Available Projections
UTM - User Selectable Zones - NAD27 / NAD83 / WGS72 / WGS84
State Plane - User Selectable Zones - NAD27 / NAD83
Latitude / Longitude - NAD27 / NAD83 / WGS72 / WGS84
Web Mercator
- WGS84
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Optional Shaded Elevation Models can be added as an additional file.
Click Here for Additional Information.
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