Simon, What options did you use to create your grid? Depending on what you chose, your original grid values may not be honored. An example of this concerns the Natural Neighbor interpolation. You have three options - linear, smooth without overshoot, and smooth with overshoot. I've noticed that on the latter two options my original point values are rarely honored (however they do make nice looking maps). So where date integrity is needed I choose linear.
Hope this helps. Josh C. Hickman Exploration Geoscientist CNX Gas LLC PO Box 947 Bluefield VA 24605 Work: 276-988-1036 Fax: 276-988-1076 -----Original Message----- From: Simon H�bert [mailto:[EMAIL PROTECTED] Sent: Thursday, November 13, 2003 3:40 PM To: [EMAIL PROTECTED] Subject: MI-L region to grd (difference in values) I created a grd file in VM with a layer of regions with wind speed values and I have difference with these values and my original vectoriel values. It's not big differences but enough to affect my results. I don't understand why these differences. Do you think that it would be better if I try an interpolation with my region centroid points? Simon H�bert Sp�cialiste SIG H�limax �nergie inc. / Helimax Energy inc. --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 9146
