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The boundary files available for download include:
DLG 2000 - USGS Digitial Line Graph files.
STR Street Files - US 2000 Census TIGER street data in GSI Street File (.STR) format.
US County 2000 - United States county boundaries and data (2000 census).
US Miscellaneous - Miscellaneous United States boundary files.
US PLSS - Townships of the Public Land Survey System (PLSS) for 30 states.
US Roads 2010 - Major roads and highways of the United States.
World Administrative 2009 - Boundary files of many countries of the world, with first-level administrative divisions.
World Miscellaneous - Miscellaneous world boundary files.
ZIP3_2000 - Three digit US ZIP code boundaries.
If you do not find what you need, we suggest searching the web for boundary files. Try starting with our Useful Links knowledge base article.
For use in MapViewer, the best formats for thematic mapping are Atlas Boundary (BNA), ESRI Shapefiles (SHP+DBF), or ESRI ArcInfo Export Format (E00). These formats carry Primary IDs, so you can create a thematic map in MapViewer with them directly. Other formats such as AutoCAD DXF, metafiles, and bitmaps can be used as reference maps, though they would have to be edited if you need to make thematic maps from them.
Updated July 31, 2018