greatCircle

Get points on a great circle as defined by the shortest distance between two specified 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

greatCircle 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>n</dt>
<dd>The requested number of points on the Great Circle</dd> <dt>sp</dt>
<dd>Logical. Return a SpatialLines object?</dd>
 
</dl>

Arguments

Robert Hijmans, based on a formula provided by Ed Williams

Author

Great circle — greatCircle

<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>n</dt>
<dd>The requested number of points on the Great Circle</dd>

 <dt>sp</dt>
<dd>Logical. Return a SpatialLines object?</dd>
 
</dl>

greatCircle: Great circle

Description

Usage

Value

Arguments

Author

References

Examples