Loximuthal

Producer Field Guide

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Producer Field Guide
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Producer

The distortion of the Loximuthal projection is average to pronounced. Distortion is not present at the central latitude on the central meridian. What is most noteworthy about the loximuthal projection is the loxodromes that are "straight, true to scale, and correct in azimuth from the center" (Snyder and Voxland, 1989).

Construction

Pseudocylindrical

Property

Neither conformal nor equal-area

Meridians

The "central meridian is a straight line generally over half as long as the Equator, depending on the central latitude. If the central latitude is the Equator, the ratio is 0.5; if it is 40° N or S, the ratio is 0.65. Other meridians are equally spaced complex curves intersecting at the poles and concave toward the central meridian" (Snyder and Voxland, 1989).

Parallels

Parallels are straight parallel lines that are equally spaced. They are perpendicular to the central meridian.

Graticule spacing

See Meridians and Parallels. Poles are points. Symmetry exists about the central meridian. Symmetry also exists at the Equator if it is designated as the central latitude.

Linear scale

Scale is true along the central meridian. Scale is also constant along any given latitude, but different for the latitude of opposite sign.

Uses

World maps where loxodromes (rhumb lines) are emphasized.

Source: Snyder and Voxland, 1989

Loximuthal Projection

map_projection_loximuthal

Source: Snyder and Voxland, 1989