Transverse Mercator Extended Projection

This is a variation of the standard Transverse 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 "TransverseMercatorExtended" 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 Reduction Factor at the Center of the Projection

scale_factor

Double

False Easting

false_easting

LinearValue

False Northing

false_northing

LinearValue

Average Elevation (Minnesota and Wisconsin)

average_elevation

LinearValue

Average Geoid Height (Wisconsin only)

average_geoid_height

LinearValue