NEW -- You may now choose whether to clip your downloaded files to county boundaries based on 2000 U.S. Census Bureau files or to county boundaries from the Montana Spatial Data Infrastructure (MSDI).

Most of the boundaries in the MSDI county layer are more accurate than the 2000 Census boundaries, but the 2000 Census boundaries will line up better with many of the Bundler's data layers that are based on 1:100,000 scale USGS and Census Bureau data.

Use MSDI Counties Use 2000 Census Counties