distCosine

The shortest distance between two points (i.e., the 'great-circle-distance' or 'as the crow flies'), according to the 'law of the cosines'.
This method assumes a spherical earth, ignoring ellipsoidal effects.

 spatial 

Spherical trigonometry for geographic applications. That is, compute distances and related measures for angular (longitude/latitude) locations.

Robert Hijmans

geosphere

Spherical Trigonometry

Robert J. Hijmans

Charles Karney

Ed Williams

Chris Vennes

distCosine function

<dl> <dt>p1</dt>
<dd>longitude/latitude of point(s). Can be a vector of two numbers, a matrix of 2 columns (first one is longitude, second is latitude) or a SpatialPoints* object</dd> <dt>p2</dt>
<dd>as above</dd> <dt>r</dt>
<dd>radius of the earth; default = 6378137 m</dd>
 
</dl>

Arguments

Author

'Law of cosines' great circle distance — distCosine

<dl>

 <dt>p1</dt>
<dd>longitude/latitude of point(s). Can be a vector of two numbers, a matrix of 2 columns (first one is longitude, second is latitude) or a SpatialPoints* object</dd>

 <dt>p2</dt>
<dd>as above</dd>

 <dt>r</dt>
<dd>radius of the earth; default = 6378137 m</dd>
 
</dl>

distCosine: 'Law of cosines' great circle distance

Description

Usage

Value

Arguments

Author

References

See Also

Examples