First off thanks to everyone who has given advice, all of it has helped tremendously. I am having a problem getting my rasters to overlay correctly. I have a global.tiff raster that is an X,Y coordinate system of (90,-90,180,-180). When I bring in my temperature raster(converted tiff, from netcdf) also in X,Y (90,-90,180,-180). The rasters have the same spatial extent, but the continents do not line up. I am thinking I have to re-do my location using wgs84 as my datum and ellipsoid, but I was hoping there might be another way to get the continent areas to fit over top of each other.
Thanks,
Aaron