The SDTS filter imports uniform lattices from several two-dimensional elevation grid file formats.


There are two separate types of SDTS DDF files. The Topological Vector Profile SDTS files contain boundary information. The Raster Profile SDTS files contain gridded elevation information.


File Description

The Spatial Data Transfer Standard, or SDTS, is a robust way of transferring earth-referenced spatial data between dissimilar computer systems with the potential for no information loss. It is a transfer standard that embraces the philosophy of self-contained transfers, i.e. spatial data, attribute, georeferencing, data quality report, data dictionary, and other supporting metadata all included in the transfer.


File Name Extensions



Voxler can read the information in the various files directly from the compressed file. You do not need to unzip the compressed file.


If you do unzip the .TAR.GZ, .TAR, .ZIP, or .TGZ file containing the DDF files, there is an option in WinZip (or other unzipping software) that needs to be disabled. Use the WinZip settings to disable this option. All .DDF files must be extracted into the same directory.


Format(s) Supported for Import

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


Import Method

Choose the File | Import command.


Import Options

Specify import options in the Lattice Import Options dialog.


Other Notes

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





See Also


GTOPO-30 .HDR Files

DTED .DT0, .DT1, .DT2 Files

File Format Chart