gcLon

Longitudes at which a great circle crosses a latitude (parallel)

 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

gcLon 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>lat</dt>
<dd>a latitude</dd></dl>

Arguments

Robert Hijmans based on code by Ed Williams

Author

Longitude on a Great Circle — gcLon

<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>lat</dt>
<dd>a latitude</dd>

</dl>

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gcLon: Longitude on a Great Circle

Description

Usage

Value

Arguments

Author

References

See Also

Examples