I got hundreds of data sets which are projected to geographic lat/long projection. I have to convert their map projection to a certain and downscale them for a higher spatial resolution. So, first I need to register the map info. The original data files do not have any map info in them. I don't want to use iMAP tool, because I have to do this job one by one with it. I cannot find any IDL command for the same job. Please, help me. In addition, how can I do spatial resampling for downscaling image data in IDL? Any simple command? Thanks - Bryan