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