Oblique Mercator County CRS – Global Mapper

This is a variation of the standard Oblique Mercator projection that is provided for the definition of coordinate systems used in specific counties in the U.S. states of Minnesota and Wisconsin. Within a specific county in one of these states, the ellipsoid must be expanded by an additional amount to account for the average elevation within that county. In the case of a Wisconsin county, the ellipsoid must also be adjusted based on the average geoid height for that county. For Minnesota counties, the average geoid height should be set to zero.

The "ObliqueMercatorCounty" Projection has the following Parameters:

Parameter Name	Parameter String	Units
Longitude of the Central Meridian	central_meridian	AngularValue
Latitude of the Origin of the Projection	latitude_of_origin	AngularValue
Scale Factor at the Center of the Projection	scale_factor	ScalarValue
Azimuth	azimuth	LinearValue
False Easting	false_easting	LinearValue
False Northing	false_northing	LinearValue
Elevation Shift	elevation_shift	LinearValue