Hello Michael, Armando's advice is essentially correct, as proven by your experience. The only detail I would add is that specifying an "a" value is redundant when specifying the GRS80 ellipsoid; the ellipsoid specification implies a major axis. Just specifying the ellipsoid is enough. As for it being the "right" one? That's harder to tell. From the ECW file you sent us, the "datum" specified in the header is NAD83, so, for the UTM system, the GRS80 ellipsoid is probably the correct choice.
The real issue is that specifying an ellipsoid in the Maptitude "ECW" file shouldn't really be necessary. We're looking into what's going on here, but, in the mean time, your solution is basically correct. > Armando, > > Thanks Again for the very helpful hint! I determined that if i edit > the ECW in the Maptitude directory and add the following parameters > to the NUTM projections, the images are handled properly: > > a=6378137 ellps=GRS80 > > Philip, can you confirm that this is the major axis and ellipsoid i > should be using for all of the NUTM zones? If so, i think i am in > good shape. > > Armando, you saved the day! Also, kudos to Caliper for setting up > this user group! I am, now, a true believer! !.!.!.!.!.!.!.!.!.!.!.!.!.!.!.! Philip Villars Caliper Corporation 1172 Beacon Street Newton MA 02461 617-527-4700 [EMAIL PROTECTED] www.caliper.com ------------------------ Yahoo! Groups Sponsor --------------------~--> In low income neighborhoods, 84% do not own computers. At Network for Good, help bridge the Digital Divide! http://us.click.yahoo.com/EA3HyD/3MnJAA/79vVAA/C5grlB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Maptitude/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
