Hammer-Aitoff

Description

The Hammer–Aitoff projection is a modification of the Lambert azimuthal equal area projection.

Learn more about the Lambert azimuthal equal area projection

Projection method

Modified azimuthal. The central meridian is a straight line half as long as the equator. The other meridians are complex curves, concave toward the central meridian and unequally spaced along the equator. The equator is a straight line; all other parallels are complex curves, concave toward the nearest pole and unequally spaced along the central meridian.

Point of tangency

Central meridian at the equator.

Linear graticules

The equator and central meridian are the only straight lines.

Properties

Shape

Distortion increases away from the origin.

Area

Equal area.

Direction

Local angles are true only at the center.

Distance

Scale decreases along the equator and central meridian as distance from the origin increases.

Limitations

Useful only as a world map.

Uses and applications

Thematic maps of the whole world.

Parameters

Desktop

• False Easting
• False Northing
• Central Meridian

Note:

Supported on spheres only.

Workstation

• Longitude of Central Meridian

Note:

Supported on spheres only.