How To: Convert SDTS raster data to an ArcInfo GRID
Use the SDTS Raster to Grid utility to convert raster data in SDTS format to an ArcInfo Grid. The USGS commonly uses the SDTS format to deliver raster data such as Digital Elevation Models (DEMs).
Before beginning this conversion process, if extracting the SDTS data using the WinZip utility, refer to the Knowledge Base article "How To: Fix WinZip configuration and avoid data corruption" in the Related Information section below for instructions on extracting the data from the .TAR.GZ compressed folder.
If these instructions are not followed, the data may be corrupted.