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| Where can I download boundary files? | |||||||||
The boundary files available for download include: City - Point location of cities. DLG - USGS Digitial Line Graph files. US Streets - US 2000 Census TIGER street data in GSI Street File (.STR) format (only for MV). US County - United States county boundaries and data (1990 and 2000 census). US Miscellany - Miscellaneous United States boundary files. US PLSS - Townships of the Public Land Survey System (PLSS) for 30 states. US Roads - Major roads and highways of the United States. World Aministrative - Boundary files of many countries of the world, with first-level administrative divisions. World Miscellany - Miscellaneous world boundary files. Zip 3 - Three digit US Zip code boundaries. Zip 5 - Five 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 page. 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. |
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