I'm at a loss here for the right command. I have a large contour map and want to extract a rectangle of data from it.
I don't want to mess around with trimming entities - just specify window and delete everything outside it.
Any ideas?
How about a viewport in paperspace, you could probably achieve what you need without deleting anything.
If it's just straight AutoCAD (not Civil3D) with just polylines, try drawing a rectangle around the area, then trim-fence outside the rectangle.
Erase command.
Then All to select everything then hold shift down and deaw a window to remove entities from the selection set.
Whether you draw the window left to right or vice versa determines whether objects that cross the window are deleted or not
The trimming by fence is what I was trying to do, but it kept freezing my computer up.
XTRIM ended up working for me. I still had to erase the stuff outside the rectangle, but selecting everything inside, then escaping, issuing the delete command, selecting all, then removing prev. selection set did the trick.
It may have been freezing because the properties dialog box was open - if you have it open and you select (or otherwise "attack") a lot of polylines and/or polylines with lots of vertices then it can hang up and freeze while processing them through the properties dialog. (same with other large quantities of objects).
One method would be to use SELECT with the WPolygon option to select all the objects completely within the polygon boundary.
As totalsurv said, use a viewport in paperspace, then export to a new drawing.
Right-click over the paperspace name, the choose export...
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Jose Duran, post: 433886, member: 11714 wrote: As totalsurv said, use a viewport in paperspace, then export to a new drawing.
Right-click over the paperspace name, the choose export...
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Nice didn't know this was possible - but the coordinate system gets lost?
Scale and move it to the desired coordinate system.
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Never tackled this issue, you could try WBLOCK. and then edit out data that's not of concern from the block you created. Might help with the file size lock up issue.
Last year I switched to a grid system of tins via carlson. I divided up the town based on lidar via [REDACTED]. I then brought it into Carlson and used inclusion exclusion to eliminate the buildings, water courses, etc.
Now I use RECTANGLE to show my area, triangulation file utilities, inclusion area, save as new tin, contour that file...
spledeus, post: 433902, member: 3579 wrote: Last year I switched to a grid system of tins via carlson. I divided up the town based on lidar via [REDACTED]. I then brought it into Carlson and used inclusion exclusion to eliminate the buildings, water courses, etc.
Now I use RECTANGLE to show my area, triangulation file utilities, inclusion area, save as new tin, contour that file...
But what happen if imaudiger doesn't have Carlson?
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I do have Autocad with Carlson, but was able to accomplish what I needed by using the XTRIM command, which allows you to trim all objects crossing a specified rectangle. I then manually erased the data outside the rectangle.
imaudigger, post: 434149, member: 7286 wrote: I do have Autocad with Carlson, but was able to accomplish what I needed by using the XTRIM command, which allows you to trim all objects crossing a specified rectangle. I then manually erased the data outside the rectangle.
In Carlson:
Edit->Erase->Erase By Closed Polyline
navaran, post: 434207, member: 1096 wrote: In Carlson:
Edit->Erase->Erase By Closed Polyline
Now that is slick - exactly what I was imagining.
Thank you for pointing that Carlson tool out to me.