Digital Elevation Models
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
Have all voided and slivered areas filled
Made as rectangular data sets to be compatible with our
ChartTiff Geo's and GeoLite's
File names compatible with USGS DRG Quad file names
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)
Vertical Resolution: Decimal or whole units of meters or feet
Vertical Datum: 1929 (NGVD 29)
USGS DEM (Digital Elevation Model) format documentation:
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:
C Tech File Format
GMF and EFF files, directly read by C Tech Software
UTM - User Selectable Zones - NAD27 / NAD83 / WGS72 / WGS84
State Plane - User Selectable Zones - NAD27 / NAD83
Latitude / Longitude - NAD27 / NAD83 / WGS72 / WGS84
Optional Shaded Elevation Models can be added as an additional file.
Click Here for Additional Information.