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MathUtilGreatCircle Method

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Calculate the distance (in radians) between 2 latitude/longitude pairs over the surface of a sphere.

Namespace:  Telogis.GeoBase
Assembly:  geobase.net (in geobase.net.dll) Version: 4.99.0.0
Syntax
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public static double GreatCircle(
	double lat1,
	double lon1,
	double lat2,
	double lon2
)

Parameters

lat1
Type: SystemDouble
latitude 1 in radians
lon1
Type: SystemDouble
longitude 1 in radians
lat2
Type: SystemDouble
latitude 2 in radians
lon2
Type: SystemDouble
longitude 2 in radians

Return Value

Type: Double
The distance over the surface of a sphere between the latitude/longitude pairs.
Remarks
A great circle is a circle drawn around the surface of a sphere. Both sphere and circle share the same center, and for any two given points (the latitude/longitude pairs) on the sphere's surface there is a unique great circle. The smallest arc between the two points on the great circle describes the shortest distance between the two points.
See Also