Geocart Projections

What is a projection?

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Bacon globular

Glareanus globular

Loritz globular

Classification

Geocart menu class: Miscellaneous
Globular
Neither conformal nor equal area

Graticule

Meridians: Central meridian is straight. Other meridians are circular arcs equally spaced along the Equator but not along other parallels.
Parallels: Parallel straight lines equally spaced on the meridians 90° from center
Poles: Points
Symmetry: About the central meridian or the Equator
Scale: True along the Equator

Distortion

Extreme area and shape distortion near the poles

Usage

Early hemispheric maps

Origin

Presented by Roger Bacon (1214–1294) of England, about 1265, but unclear

Similar projections

Glareanus (Loritz) projection of 1527 is identical.
Apian Globular I hemisphere of 1524 has straight parallels equally spaced along the central meridian.

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.