Dick-
I think I have something simpler than digitizing for you.
Let's assume 80 channels of res (rho, p1-p80) at 5m intervals and a strong
res contrast at an interface with a constant threshold.
Make a new channel "depth".
depth=(p80<.thresh.)?400:400;
depth=(p79<.thresh.)?395:depth;
depth=(p78<.thresh.)?390:depth;
etc.
This should give you one channel with the depth to the top of the first
conductive interface.
-Jeff
At 12:24 PM 4/14/00 , you wrote:
>We are processing some Geotem data and have used EM Flow to create
>conductivity-depth sections, which we have exported into Montaj. We have
>about 20 lines and they are oriented approximately NW-SE
>
>For each X,Y and Fid in the Montaj data base we have multiple conductivity
>values (viz. a conductivity value for each depth at 5m intervals ranging
>from the surface to 400m depth)
>
>We have gridded each line, using the depths as a "pseudo" Y value. We can
>then display an image of the conductivity-depth section of each line, with X
>along the horizontal axis and depth along the vertical axis.
>
>Then we can digitise a particular "stratigraphic horizon" (in this case a
>marked change in conductivity corresponding to a conductive rock unit) along
>the length of the line, using a grid file of the depths from 0-400 as the
>reference file. The output from this process is a file with X and Depth
>coordinates, but no Y.
>
>We want to grid and contour the digitised depth values (stratigraphic
>horizon) for all 20 lines. But we cannot figure out how to "merge" the file
>of X and Depth values from the digitising with the original line data to
>obtain the Y values for each digitised point.
>
>Hope the above is clear.
>
>Can anyone offer any suggestions?
>
>Dick Irvine
>-----------------------------------------------
>Dick Irvine
>Condor Consulting, Inc.
>4860 Robb St., Suite 206
>Wheat Ridge, CO 80033
>Tel (303) 423 8475
>Fax (303) 4239729
>Mobile (720) 318 4439
>EMAIL: [EMAIL PROTECTED]
>
>
>_______________________________________________________
>More mailing list info http://www.geosoft.com/support/listserv/index.html
*******************
* Jeff Gamey (4tj)
* Environmental Sciences Division
* Oak Ridge National Laboratory
* [EMAIL PROTECTED]
* (865) 574-6316 tel
* (865) 576-8646 fax
_______________________________________________________
More mailing list info http://www.geosoft.com/support/listserv/index.html
