Howdy,I finaly was able to create 10 meter and 30 meter mesh for my local area. Some of the data is a bit out dated and I was wondering if there are any programs or methods to raise or lower portions of the terrain to conform to what is actually there?ThanksPhil C.

Hi Phil:depending on the size and characteristics of your area you can either use 'external' flatten switches that leave the elevation data as they are (see http://www.fs-traveler.com/flatten.shtml), or use a GIS to edit the data points directly. I have used the editor in Microdem (http://www.usna.edu/Users/oceano/pguth/website/microdemdown.htm and http://www.3dartist.com/3dao/r/allenbil/md/md4art.htm) and it works, but if the area is larger than 10x10 cells or so it will be extremely tedious.There might be simpler editors out there but I don't know of any.Cheers, Holger

Hi Holger,Thanks for the reply. The url's you provided are a wealth of information that'll take aleast a few days to sort out. Thanks again,Phil