SDTS Digital Elevation Model .DEM File Description

 

The SDTS Digital Elevation Model filter imports elevation data in the form of a uniform lattice from SDTS Digital Elevation Model .DEM data sets.

 

File Description

There are two separate types of SDTS DEM files. The Topological Vector Profile SDTS files contain boundary line information.

 

The Raster Profile SDTS files contain gridded elevation information and can be used to directly create a grid-based map such as a contour map. An uncompressed SDTS contains several files with the .DDF extension. All of the .DDF files are necessary to produce a map (i.e. you cannot copy just one .DDF file and create a map from it). You can choose any of the .DDF files when importing a base map with the Topological Vector Profile SDTS files.

 

File Name Extensions

.DDF

 

Format(s) Supported for Import

2D uniform lattice; 8-, 16-, 32-bit integer, float, double

 

Import Method

Choose the File | Import command.

 

Remarks

SDTS data sets can contain elevation data or several other types of data that are not applicable. If you attempt to import an SDTS data set that does not contain elevation data, an error message displays.

 

 

See Also

USGS Digital Elevation Model File Description

File Format Chart