Geocart Projections

What is a projection?

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Geocart menu class: Lenticular
Modified azimuthal
Equal area


Meridians: Central meridian is straight. Other meridians are complex curves.
Parallels: Complex curves
Poles: Points
Symmetry: About the central meridian


True scale at latitudes 3.6° and 86.4° N. at central meridian


None at latitudes 3.6° and 86.4° N. at central meridian

Other features

An oblique Hammer projection centered at latitude 45° N. and longitude 10° E. and bounded by an ellipse having an axis ratio of 1.75 to 1 instead of 2 to 1, after the vertical coordinates are expanded and the horizontal coordinates are contracted


Whole-world maps showing continents grouped near the center


Presented by William A. Briesemeister of the American Geographical Society in 1953

Similar projections

Hammer (Elliptical), the normal aspect of the Briesemeister, but having an axis ratio of 2 to 1
Nordic, by John Bartholomew, is the same as the Briesemeister projection, except that the axis ratio is 2 to 1 and the central meridian is 0°.

Description adapted from J.P. Snyder and P.M. Voxland, An Album of Map Projections, U.S. Geological Survey Professional Paper 1453. United States Government Printing Office: 1989.