LM-MNDOT: Lambert Conformal Conic Projection, Minnesota DOT Variation
This is a minor variation to the traditional Two Standard Parallel projection version. It supports the county coordinate systems developed by the Minnesota Department of Transportation. This variation uses a parallel ellipsoid technique – different from that used in Wisconsin – to adjust horizontal coordinates for average elevation of the mapped region.
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Parameter Name |
Description |
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PARM1 |
Latitude, in degrees, of the first standard parallel, usually the northernmost. For this projection, no distinction is made between the northern and southern standard parallels; that is, they can be switched with no effect. |
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PARM2 |
Latitude, in degrees, of the second standard parallel, usually the southernmost. Rarely this is the same as PARM1 to obtain a conic with a single point of tangency. |
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PARM3 |
Average elevation above the ellipsoid, in system units, of the region being mapped by this coordinate system. |
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ORG_LNG |
The longitude, in degrees, of the origin of the projection. |
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ORG_LAT |
The latitude, in degrees, of the origin of the projection. |
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MAP_SCL |
Used only when defining a coordinate system that is to produce measurements on a scaled paper map. This value is the scale of the map, e.g., 100,000. Normally, this value is set to 1.0. |
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X_OFF |
The false easting to be applied to all X coordinates, usually selected to cause all X coordinates within the coordinate system to be positive values of reasonable size. |
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Y_OFF |
The false northing to be applied to all Y coordinates. |