Wolfram 语言与系统 10.0 (2014)|旧版文档

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GeoCircle

GeoCircle[loc,r]
is a two-dimensional GeoGraphics primitive that represents a circle of radius r centered at the location loc on the surface of the Earth.

GeoCircle[loc,r,{α1,α2}]
represents a sector of a circle from bearing to bearing .

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  • A geo circle with center loc and radius r is defined as the endpoints of all geodesics of length r starting from loc. Specifying bearings and restricts the set of geodesics.
  • The location loc can be specified either as latitude and longitude coordinates in degrees, GeoPosition[], or as named geographical entities Entity[].
  • The radius r can be a distance in meters or a Quantity object. Distances in angular degrees are taken as equivalent length distances on the equator.
  • Bearings and are measured in degrees clockwise from true north, and can be given as Quantity angles or as numbers in degrees.
  • GeoCircle[loc] represents a geo circle centered at loc, extending the equivalent of one degree of quator in every direction.
  • GeoCircle[] is equivalent to GeoCircle[$GeoLocation].
2014年引入
(10.0)