Lambert azimuthal equal-area
Geocart menu class: Azimuthal
Meridians: Equally spaced straight lines intersecting at the central pole. Angles between them are the true angles.
Parallels: Unequally spaced circles, centered at the pole, which is a point. Spacing of the circles gradually decreases away from the pole. The entire Earth can be shown, but the opposite pole is a bounding circle having a radius 1.41 times that of the Equator.
Symmetry: About any meridian
Meridians: Central meridian is a straight line. Meridian 90° away is a circle. Other meridians are complex curves, unequally spaced along the Equator and intersecting at each pole. Spacing decreases away from the central meridian.
Parallels: Equator is a straight line. Other parallels are complex curves concave toward the nearest pole. They are unequally spaced along the central meridian, and spacing decreases away from the Equator. Along the meridian 90° from the central meridian, parallels are equally spaced.
Symmetry: About the central meridian or the Equator
Meridians: Central meridian is a straight line. Other meridians are complex curves intersecting at each pole shown.
Parallels: Complex curves unequally spaced along the central meridian; spacing decreases away from the center of projection
Symmetry: About the central meridian
True only at the center in all directions. Decreases with distance from the center along radii. Increases with distance from the center in a direction perpendicular to radii.
Only the center is free from distortion. Distortion is moderate for one hemisphere but becomes extreme for a map of the entire Earth.
Frequently used in the polar aspect in atlases for maps of polar regions and of Northern and Southern Hemispheres. The equatorial aspect is commonly used for atlas maps of the Eastern and Western Hemispheres. The oblique aspect is used for atlas maps of continents and oceans. The equatorial and oblique aspects are used by the U.S. Geological Survey in cooperation with others for maps of the Circum-Pacific Map Project.
Recommended for equal-area maps of regions approximately circular in extent
Presented by Johann Heinrich Lambert (1728–1777) of Alsace in 1772
Lorgna (for polar aspect, due to independent derivation, 1789)
W. William-Olsson's projection combines the Lambert Azimuthal Equal-Area with a modified Werner.
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.