gcLat

Latitude at which a great circle crosses a longitude

 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

gcLat function

<dl> <dt>p1</dt>
<dd>Longitude/latitude of a single point, in degrees; 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>lon</dt>
<dd>Longitude</dd></dl>

Arguments

Robert Hijmans based on a formula by Ed Williams

Author

Latitude on a Great Circle — gcLat

<dl>

 <dt>p1</dt>
<dd>Longitude/latitude of a single point, in degrees; 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>lon</dt>
<dd>Longitude</dd>

</dl>

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gcLat: Latitude on a Great Circle

Description

Usage

Value

Arguments

Author

References

See Also

Examples