RE: draping vector polygons over topography

[Leo M. Romeijn]

Ken,               I have draped polylines over a Landsat/DEM in 3D mode. In the beginning I had the same problem with the lines cutting through the hill side, and coming out the other side. I do not remember why it was doing that, but the way I setup my layers now is to have the vector layer on the same surface as the image and DEM. Also, before going into 3D perspective mode, select your height layer, open the transform edit dialogue box, select the edit button, and select “delete this transform”. Now go into 3d mode.   Hope this helps,     Leo M. Romeijn Satellite Imaging Corporation 121 Hawkstone Rd. Woodland, WA, USA 98674 (360) 225-0625 ~ (360) 225-0833 (Fax) [EMAIL PROTECTED] Web: http://www.satimagingcorp.com   -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Ken Hickey Sent: Monday, January 14, 2002 6:28 PM To: [EMAIL PROTECTED] Subject: draping vector polygons over topography   G'day all   This is probably an basic question, but what do I have to do to get some vector polygons (defining a geological unit) to drape correctly over a DEM in #D mode. When I try, the topography "cuts thru" the vector polygons in 3D views. I though maybe I have to save the polygons as raster regions to get them to drape correctly, but when I use the "save as" option in the "tools" dialog box I get an error saying "dataset header file for region output doesn't exist". What does this mean? How do I convert a set of vector polygons intot raster regions?   Thanks in advance   Cheers Ken Hickey ------------------------------------------------------------------ Dr Kenneth Hickey Mineral Deposit Research Unit (MDRU) Department of Earth and Ocean Sciences University of British Columbia 6339 Stores Rd, Vancouver, BC  V6T 1Z4, Canada phone +1-604-822-3765; Fax +1-604-822-6088 email: [EMAIL PROTECTED]   .