Directory of Map Projections

What is a projection?

Previous | Next

Clarke twilight

Description

A perspective projection developed to encompass a hemisphere plus the twilight zone (astronomical twilight is 18° beyond the hemisphere).

Classifications

azimuthal
perspective

Graticule

Meridians: Central meridian is straight. Other meridians are complex curves in the oblique form in which it is usually used.
Parallels: Complex curves in the oblique form in which it is used.

Similar projections

This projection is a specialization of the far-side perspective.
Other far-side perspectives are AMS lunar, Fischer far-side perspective, James far-side perspective, Gretschel….

Origin

Developed by Alexander Ross Clarke in 1879.

Description ©2010–2020 Mapthematics LLC.