Albers projection


The Albers equal-area conic projection, or Albers projection, is a conic, equal area map projection that uses two standard parallels. Although scale and shape are not preserved, distortion is minimal between the standard parallels.
The Albers projection is used by the United States Geological Survey and the United States Census Bureau. Most of the maps in the National Atlas of the United States use the Albers projection. It is also one of the standard projections used by the government of British Columbia, and the sole governmental projection for the Yukon.

Formulas

For Sphere

describes generating formulae for the projection, as well as the projection's characteristics. Coordinates from a spherical datum can be transformed into Albers equal-area conic projection coordinates with the following formulas, where is the radius, is the longitude, the reference longitude, the latitude, the reference latitude and and the standard parallels:
where