More than lat/long and UTM coordinates, there are many unique coordinate systems that are sometimes used for quite small jurisdictions. For example, EPSG:7595 i

More than lat/long and UTM coordinates, there are many unique coordinate systems that are sometimes used for quite small jurisdictions. For example, EPSG:7595 is valid Chippewa County, Wisconsin [0]. A big gotcha with some of these systems, in addition to the datum, is the units of measure. Some are in metres while many in the US use ft. 0. http://epsg.io/7595 http://epsg.io/7595