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Winkel Tripel

  • Description
  • Projection method
  • Linear graticules
  • Properties
  • Limitations
  • Uses and applications
  • Parameters

Description

A compromise projection used for world maps that averages the coordinates from the equirectangular (equidistant cylindrical) and Aitoff projections. Developed by Oswald Winkel in 1921.

  • Learn about the equirectangular (equidistant cylindrical) projection
  • Learn about the Aitoff projection
Illustration of the Winkel Tripel projection

Projection method

Modified azimuthal—coordinates are the average of the Aitoff and equirectangular projections. Meridians are equally spaced and concave toward the central meridian. The central meridian is a straight line. Parallels are equally spaced curves, concave toward the poles. The poles are approximately 0.4 times the length of the equator. The length of the poles depends on the standard parallel chosen.

  • Learn about the Aitoff projection
  • Learn about the equirectangular projection

Linear graticules

The equator and the central meridian.

Properties

Shape

Shape distortion is moderate. In the polar regions along the outer meridians, the distortion is severe.

Area

Distortion is moderate. In the polar regions along the outer meridians, the distortion is severe.

Direction

Generally distorted.

Distance

Generally, scale is made true along latitudes 50.467° N and S or 40° N and S. The second case is used by Bartholomew Ltd., a British mapmaking company.

Limitations

Neither conformal nor equal area. Useful only for world maps.

Uses and applications

Developed for use in general and thematic world maps.

Used by the National Geographic Society since 1998 for general and thematic world maps.

Parameters

Desktop

  • False Easting
  • False Northing
  • Central Meridian
  • Standard Parallel 1
Note:

Supported on spheres only.

geographic_coordinate_systems.pdf

A geographic coordinate systems pdf file which contains lists of supported gcs and vcs.

projected_coordinate_systems.pdf

A projected coordinate systems pdf file which contains lists of supported pcs.

geographic_transformations.pdf

A geographic transformations pdf file which contains lists of supported geographic and vertical transformations.

Workstation

  • Radius of the sphere of reference
  • Longitude of Central Meridian
  • Latitude of standard parallel
  • False Easting (meters)
  • False Northing (meters)
Note:

Supported on spheres only.

geographic_coordinate_systems.pdf

A geographic coordinate systems pdf file which contains lists of supported gcs and vcs.

projected_coordinate_systems.pdf

A projected coordinate systems pdf file which contains lists of supported pcs.

geographic_transformations.pdf

A geographic transformations pdf file which contains lists of supported geographic and vertical transformations.

Related Topics

  • List of supported map projections
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