gcIntersectBearing

Get the two points where two great cricles cross each other. In this function, great circles are defined by a points and an initial bearing. In function <code> gcIntersect</code> they are defined by two sets of points.

 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

gcIntersectBearing 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>brng1</dt>
<dd>Bearing from p1</dd> <dt>p2</dt>
<dd>As above. Should have same length as p1, or a single point (or vice versa when p1 is a single point</dd> <dt>brng2</dt>
<dd>Bearing from p2</dd></dl>

Arguments

Chris Veness and Robert Hijmans based on code by Ed Williams

Author

Intersections of two great circles — gcIntersectBearing

<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>brng1</dt>
<dd>Bearing from p1</dd>

 <dt>p2</dt>
<dd>As above. Should have same length as p1, or a single point (or vice versa when p1 is a single point</dd>

 <dt>brng2</dt>
<dd>Bearing from p2</dd>

</dl>

gcIntersectBearing: Intersections of two great circles

Description

Usage

Value

Arguments

Author

References

See Also

Examples