[R-sig-Geo] function to convert 3D geographical coordinates to Cartesian?

[Edzer Pebesma]

Tom, I guess you are aware of rgdal::spTransform?

On 12/30/2012 06:40 AM, Tom Roche wrote:
> 
> Is there packaged code to convert geographical coordinates (e.g.,
> longitude, latitude, elevation) to Cartesian coordinates in 3-space?
> The spherical-to-Cartesian math is straightforward enough, but there's
> certainly scope for error, so I'd prefer to use tested, previously-used
> code if available.
> 
> TIA, Tom Roche <Tom_Roche at pobox.com>
> 
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-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster
Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
http://www.52north.org/geostatistics      e.pebesma at wwu.de