The Polyconic projection is neither an equal-area nor a conformal projection. Scale is true along each parallel and along the central meridian. Parallels of latitude are arcs of non-concentric circles and the projection is free of distortion only along the central meridian.
The Polyconic projection can be used to represent small areas on any part of the globe, preserving shapes, areas, distances, and azimuths in their true relation to the surface of the earth. Polyconic projections over large areas usually result in serious errors and exaggeration of details.
The "Polyconic" Projection has the following Parameters:
|
Parameter Name |
Parameter String |
Units |
|
Longitude of the Central Meridian |
central_meridian |
|
|
Latitude of the Center of the Projection |
latitude_of_origin |
|
|
False Easting |
false_easting |
|
|
False Northing |
false_northing |