DLG files are in ArcView shapefile format, and files for each quadrangle are packaged into a single ZIP file.
Scale:  1:100,000.  Projection:   Geographic (decimal degrees).  Datum:  NAD83.


     Each zip file includes these shapefiles:

Feature Filename suffix
county boundaries bound
lakes lakes
hypsography hypsography
hydrography hyd
roads rds
railroads rr
section lines sec
township lines tnrg
7.5' quadrangle boundaries quads
political boundaries bnd















    Click on the county in which you are interested to download the 100K DLG file:

South Dakota Counties.jpg