On Fri, Oct 8, 2010 at 4:42 PM, ogbos okike <ogbos.ok...@gmail.com> wrote:
> However, I am interested in organizing my data in magnetic coordinates. I > have converted my data points from geographic coordinates to magnetic > coordinates. > My problem now is to generate world map in magnetic coordinates. > Can anybody please give me a hint on how to go about this. Possibly the same way that you converted your data points from geographic to magnetic coordinates? How did you do that? The usual way of converting from coordinate systems is to use spTransform and specify the coords via EPSG coordinate codes - does your magnetic coordinate system have an EPSG code? I suspect that with the magnetic poles wandering about it will change quite frequently. Is this the case? Barry _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo