Re: [R] units for mapproject() function result

2012-02-08 Thread William Stockhausen
Hi Ray (& all), Many apologies to Ray--apparently my intuition stinks!! The projection is based on the unit sphere (R=1), so the projected coordinates really are dimensionless--as you said! So to scale up to the earth, just multiply the projected coordinate values from mapproject by your favorite

Re: [R] units for mapproject() function result

2012-02-08 Thread William Stockhausen
Hi Ray, Thanks for responding! However, it would certainly be very non-intuitive if you're correct about the units for the projected coordinates. As I'm sure you know, in a GIS geographic coordinates are usually in degrees--although it's quite possible for these to be in radians instead, I guess

Re: [R] units for mapproject() function result

2012-02-07 Thread Ray Brownrigg
On Wed, 08 Feb 2012, William Stockhausen wrote: > Does anyone know what the units are for projected coordinates obtained > using mapproj's mapproject function with an Albers projection? Thanks for > any and all help! > > Buck Stockhausen I don't know for sure, but it looks like radians to me, w

[R] units for mapproject() function result

2012-02-07 Thread William Stockhausen
Does anyone know what the units are for projected coordinates obtained using mapproj's mapproject function with an Albers projection? Thanks for any and all help! Buck Stockhausen *** * Dr. William T. Stockhausen *