Blue Stakes uses GIS data provided by the State of Utah’s Automated Geographic Reference Center (AGRC) in its mapping system. AGRC compiles official map data from local government sources, including city, county, and state agency mapping departments. The coordinate system and datum used for all Blue Stakes map layers is unprojected latitude/longitude NAD83. To view AGRC’s base map viewer, click here. You can reference this map prior to contacting Blue Stakes if you need to determine the name of a road, find latitude/longitude coordinates for your dig site, etc.