AbstractHow Montana Surveyors Improve Cadastral GIS Track: Land Management Author(s): Rj Zimmer Montana is one of the few states to have a statewide cadastral GIS. The annual economic benefits average in the multi-million dollar range - an obvious demonstration of the value of this system. Nevertheless, the methodologies used to map this statewide cadastre in a few short years resulted in some areas of the state where the spatial accuracy of property lines is not optimized for certain applications. Because most of Montana's cadastre is built upon the Bureau of Land Management's Geographic Coordinate Database (GCDB) (a representation of the Public Lands Survey System), the process for improving the spatial accuracy of the GIS cadastre first requires upgrades to the accuracy of the GCDB. Montana's surveyors play a significant role in the GCDB enhancement projects where the ultimate goal is improved spatial alignment of GIS layers. This presentation discusses the surveyor's role in making GIS better. Rj Zimmer DJ&A, PC GIS 302 N Last Chance Gulch suite 406 Helena , MT 59601 US Phone: 406-443-9062 E-mail: RjZimmer@djanda.com |