Blair, sorry, too quick: Have a look at spTransform in rgdal and at projectRaster in the raster package.
Robert On Thu, Nov 19, 2009 at 9:39 AM, Blair Christian <[email protected]> wrote: > Hi All, > > Before trying to reinvent the wheel, I was wondering if the mapproj or > any other library had code to take lambert coordinates (along with the > parameters used to generate them) and convert them to lat long. I > have grid data in lambert coords, and want to generate the long/lat > grid corners from them. I noticed mapproj goes long/lat -> > projection, but couldn't find anything to go the other way. I was > going to use the reference in wolfram mathworld to do the inverse > transform, if anybody has any issues with their version. > > http://mathworld.wolfram.com/LambertConformalConicProjection.html > > Basically, I want to keep the data stored as grids, but every now and > then I want to create distance matrices or plot them (which I > currently do with an irregular grid class I made up), but don't want > to store polygons all the time when I can just store the basic grid. > All comments welcome. > > Thanks, > Blair > > _______________________________________________ > R-sig-Geo mailing list > [email protected] > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > _______________________________________________ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
