Thanks for quick response, I did see the images of terrain data on the mentioned url, they are interesting and suit my requirement, i will certainly explore more of it,
Is it possible to keep the display in 2D itself but use dt1 files for query in mapserver, how to i know elevation at a certain point even if i don't get the display. the application i am developing is in its initial stages, do i shift to grass or continue using both.
