Parameters: Parallel curvature W
Geocart menu class: Lenticular
Meridians: Central meridian is a straight line half the length of the Equator. Other meridians are complex curves, unequally spaced along the Equator and concave toward the central meridian
Parallels: Equator is straight. Other parallels are complex curves, unequally spaced along the central meridian and concave toward the nearest pole.
Symmetry: About the central meridian and the Equator
Decreases along the central meridian and the Equator with distance from the center
Moderate. Less shearing action on the outer meridians near the poles than there is on pseudocylindrical projections.
Elliptical border. An equatorial aspect of one hemisphere of the Lambert Azimuthal Equal Area projection, on which horizontal coordinates have been doubled and meridians have been given twice their original longitudes.
Whole-world maps, also in interrupted and condensed forms
Presented by H.H. Ernst von Hammer (1858–1925) of Germany in 1892
Normal and oblique are both in use.
Mistakenly called Aitoff projection in the early 20th century.
Briesemeister, a modified oblique Hammer
Eckert-Greifendorff, a further modification of the Lambert Azimuthal Equal-Area projection
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.