I received global radiation data with longitudes of 0-360. I'm currently creating an ascii file to make a raster of the data, but have the following question for next step: How does one convert this in Arc to -180 <> +180 deg? Or maybe I don't need to? I read somewhere that Arc will display the data just fine with 0-360, but won't run calcs on the raster...does that sound right? Anyone have experience with this?