Geocart Projections

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Al-Bīrūnī

ابوریحان بیرونی

Nicolosi globular

Classifications

Geocart menu class: Miscellaneous
Globular
Polyconic
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 the center
Poles: Points
Symmetry: About the central meridian or the Equator

Scale

True along the central meridian and the Equator

Distortion

Moderate for a hemisphere
Considerable area and shape distortion if used beyond the 90th meridians

Usage

Hemispheric maps, common in atlases between 1850 and 1925

Origin

Presented by Giambattista Nicolosi (1610-70) of Rome in 1660

Other names

Arrowsmith Globular

Similar projections

Van der Grinten IV has parallels of different curvature and is extended to a world map.
Azimuthal Equidistant (equatorial aspect) has complex curves for meridians and parallels
Fournier Globular I has elliptical arcs for meridians.

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.