is a two-dimensional GeoGraphics primitive that represents a filled disk of radius r centered at the location loc on the surface of the Earth.


gives a sector of a disk from bearing α1 to bearing α2.

Details and Options

  • A geo disk with center loc and radius r is defined as the area covered by all geodesics of length r starting from loc. Specifying bearings α1 and α2 restricts the set of geodesics.
  • The location loc can be specified either as latitude and longitude coordinates {lat,lon} in degrees, GeoPosition[], or as a named geographical Entity[].
  • The radius r can be given as a Quantity length or as a number in meters.
  • Bearings α1 and α2 are measured clockwise from true north and can be given as Quantity angles, as numbers in degrees, as DMS strings, or as named compass points like "N" or "SouthWest".
  • Graphics directives such as GrayLevel, RGBColor, Opacity, and GeoStyling can be used to specify how the resulting region should be filled.
  • FaceForm, EdgeForm, and GeoStyling can be used to specify how the interiors and boundaries of geographic regions should be rendered. The default is that no explicit edge is drawn.
  • GeoDisk[loc] represents a geo disk centered at loc, with an automatic choice of radius.
  • GeoDisk[] is equivalent to GeoDisk[$GeoLocation].


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Basic Examples  (2)

A disk of 2000 kilometers around a geo location:

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A sector of a disk centered at Paris:

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Scope  (6)

Applications  (3)

Properties & Relations  (11)

Interactive Examples  (2)

Neat Examples  (1)

Introduced in 2014