----------------------------Original message---------------------------- Because T&R is not one standard grid, but at least a dozen, nation-wide, with varying start and stop points, correction lines, incomplete grids, and any number of things, I doubt any such software exists. Further, the T&R system is designed to describe *areas* whereas the UTM and Cartesian systems are designed to describe *points* Conceptually they aren't the same animals at all. I could be wrong on all this, but I'd be surprised. charley seavey aka DOCMAPS