Digital map files for the 1963, 1970, 1980, 1985, and 1990 inventories are arranged to cover one U. S. Public Land Survey System (USPLSS) section per file, or a total of 2,732 files for each inventory year. The digital map files for these years are in GenaMap software format.
Digital map files for the 1995 and 2000 land use inventories are arranged to cover one USPLSS township per file. The digital map files for these years are available in ESRI shapefile and coverage format.
The digital files contain land use polygon features, digitized from land use areas initially delineated on hardcopy products (1"=400' scale aerial photos and maps) for each year of inventory. The 1990, 1995, and 2000 inventories contain polygons that have been adjusted to fit large-scale cadastral mapping where such mapping has been completed. The land use polygons are identified by a tag or label consisting of a three-digit code and optional one-character suffix corresponding to the Commission's land use classification system. All files consist of graphic map features only and do not contain attributes at this time.