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Map projections and coordinate systems > Supported map projections

Bonne

Release 9.2
Last modified August 3, 2007
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Description

This equal-area projection has true scale along the central meridian and all parallels. Equatorial aspect is a Sinusoidal. Polar aspect is a Werner.

Illustration of Bonne projection


Projection method

Pseudo conic. Parallels of latitude are equally spaced concentric circular arcs, marked true to scale for meridians.


Point of tangency

A single standard parallel with no distortion.


Linear graticules

The central meridian.


Properties


Shape



No distortion along the central meridian and standard parallel; error increases away from these lines.

Area



Equal area.

Direction



Locally true along central meridian and standard parallel.

Distance



Scale is true along the central meridian and each parallel.


Limitations

Usually limited to maps of continents or smaller regions. Distortion pattern makes other equal-area projections preferable.


Uses and applications

Used during the 19th and early 20th centuries for atlas maps of Asia, Australia, Europe, and North America. Replaced with the Lambert Azimuthal Equal Area projection for continental mapping by Rand McNally & Co. and Hammond, Inc.
Large-scale topographic mapping of France and Ireland, along with Morocco and some other Mediterranean countries (Snyder, 1993).
Learn more about the Lambert Azimuthal Equal Area projection


Parameters


Desktop





Workstation





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