I frequently run into this situation...
I have two areas where I want to run contours in the same file, usually separated by a road or a bridge or something (as shown)
I am running Carlson 2012, and there isn't a way (that I have found) to define two perimeter pollylines at the same time. Is there a way to do this?
> I frequently run into this situation...
>
> I have two areas where I want to run contours in the same file, usually separated by a road or a bridge or something (as shown)
>
>
> I am running Carlson 2012, and there isn't a way (that I have found) to define two perimeter pollylines at the same time. Is there a way to do this?
I don't think so. I just make two TIN's, "blahblah surface date West" and "blahblah surface date East"
I typically do like Roadburner mentioned and just create two separate TINs. However, in Carlson 2013 I can select multiple inclusion/exclusion polylines. If your points are drawn at Real-Z elevations then it is simple to draw a 3-d poly around each of the areas by clicking point to point. Set Carlson to use Inclusion/Exclusion Areas and select the two bounding 3-d polylines when prompted for Inclusion perimeter polylines and it will contour only the areas inside the 3-d polylines.
:good:
Inclusion/exclusion areas
It's even simpler to shrink-wrap entities with a 3d poly (or 2d if you prefer) with the "swplines" command.
Blue line represents the inclusion polyline, Magenta is the exclusion.
"Use Inclusion/Exclusion" is checked on.
I selected the contour lines as the breaklines and plotted a smaller contour interval.
Piece of cake.
Do I need glasses or is this blurry for some reason?
EDIT: I tried selecting two separate inclusion lines that were totally separated, with no exclusion line and it generated two separate areas of triangulation in a single file. I'm using version 2014.