geosphere-package: Spherical Trigonometry
Description
Spherical trigonometry for geographic applications, such as great circle distance and distance along a rhumb line.Details
ll{
Package: geosphere
Type: Package
Version: 1.0.0
Date: 6-Feb-2010
License: GPL3
LazyLoad: yes
}
The functions compute distance and bearing (course) along great circles (= shortest distance on a sphere, or "as the crow flies") and rhumb lines (lines of constant bearing). Geographic locations are always specified in degrees (NOT radians), and the default unit of distance is meter.
This is the first version of this package, so please look out for bugs and let us know if you find any.References
http://williams.best.vwh.net/avform.htm
http://www.movable-type.co.uk/scripts/latlong.html
http://en.wikipedia.org/wiki/Great_circle_distance
http://mathworld.wolfram.com/SphericalTrigonometry.html