Yes you can. It can be a bit tricky, though. The easiest way is to find an ESRI projection engine string that defines the projection you wish to use. You can often find that from the link to the EnviPEProjcsStrings.txt file from this reference: http://www.exelisvis.com/...cleID/4455/4455.aspx Depending on what you want to do with this projection, there may be a number of steps you need to take in ENVI to get it working with your data. I recommend that you contact Tech Support or your local distributor directly for help with your particular situation. - Peg Exelis VIS