Description: Incorporated city and town limits in Yellowstone County The boundaries are generally based on parcel data which is based on the USDI Bureau of Land Management's (BLM) Geographic Coordinate Database (GCDB). The GCDB is a complex measurement management system that uses a least squares adjustment of existing survey data to come up with a digital representation of the Public Land Survey System (PLSS). For more information on GCDB, see the Montana/North Dakota BLM website at http://www.mt.blm.gov/cadastral/gcdb/index.html. Accuracy varies between townships and it is important to note that the accuracy of the data can't be any more accurate than the GCDB.
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Database of Montana Counties created to be coincident with the Montana Cadastral Parcel Boundaries. Where county boundaries are coincident with public land survey section lines, they were copied from the BLM's Geographic Coordinate Database (GCDB). If boundaries were not coincident with GCDB lines, they were digitized on screen from 1:24,000 scale Geological Survey Digital Raster Graphics (DRGs). County Boundaries will change as the GCDB is adjusted by the BLM and those data are imported into the Cadastral Data Model. Adjusted to the version of CADNSDI at this time period 9/1/2014.</SPAN></P></DIV></DIV></DIV>
Copyright Text: US Bureau of Land Management, Geographic Coordinate Database, US Geological Survey 1:24,000 Digital Raster Graphics