Dear Ken,

just use File>save as>*.ers while only your vector file is open in the Algorithm
window. It is best solution if you want drape filled poligons on topo. You can
drape vector lines with the same method but then you can not show vector on 3D
image (image + DEM). Unfortunately, I could not find a easy solution that
prevents topography  from "cuts thru" the vector polygons in 3D views.

I hope this helps
Best regards
Yucel
---------------
Yucel Erbay
NIK Insaat Ticaret Ltd. Co.
Softwares & Satellite Imagery Distribution
Construction & Restoration
http://www.nik.com.tr
Ortaklar Cad. Yonet Apt. No:27/6
Mecidiyekoy 80290 -Istanbul/TURKIYE
Tel: +90-212-347 38 15 (pbx)
Fax:+90-212-288 76 02


----- Original Message -----
From: "Ken Hickey" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, January 15, 2002 4:28 AM
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]

.



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