topic Re: Delete surface lines outside a boundary in Civil 3D Forum

Delete surface lines outside a boundary

wilsonm2000 — Tue, 04 Jun 2024 10:39:39 GMT

To avoid huge MMS files, I want to delete lines outside a chosen boundary instead of just choosing a surface boundary in surface definition. Anyone know a good LISP routine for this, or add-on? Using "delete line" definition just isn't practical.

Re: Delete surface lines outside a boundary

caddie99 — Tue, 04 Jun 2024 12:58:12 GMT

I think this is what you want

https://forums.autodesk.com/t5/civil-3d-forum/answer-day-build-a-surface-that-stops-exactly-at-the-property/m-p/6333207#M302008

Re: Delete surface lines outside a boundary

v-silvestre — Tue, 04 Jun 2024 13:12:40 GMT

Hi, you could also try using a Cropped Surface. https://help.autodesk.com/view/CIV3D/2023/ENU/?guid=GUID-D1B688D3-2714-45AF-B367-581476922E8B

Jerry Bartel's has great video going over how to create one: https://www.youtube.com/watch?v=QSPEYhtlO6Y

Re: Delete surface lines outside a boundary

jroot — Tue, 04 Jun 2024 14:45:17 GMT

This sounds a lot like the wish I had a few years ago:

https://forums.autodesk.com/t5/civil-3d-ideas/breakline-to-triangulate-on-one-side-only/idi-p/9509877

Re: Delete surface lines outside a boundary

trumankiko — Wed, 05 Jun 2024 17:35:03 GMT

it would be nice to have this solved. i had problems with ill-formed boundaries that led me to deleting SO MANY lines in my surface 😞

Re: Delete surface lines outside a boundary

Jeew-m — Mon, 10 Jun 2024 17:50:58 GMT

Hi,

How about using a data clip boundary for surface.

Re: Delete surface lines outside a boundary

chriscowgill7373 — Fri, 26 Jul 2024 19:14:00 GMT

I like the Data Clip idea, it is the first boundary in the list, then everything else follows, which is opposite of using a boundary that is destructive.

would something like MAPTRIM work in your case? I am thinking it might not, as it probably wouldnt be able to break apart the surface definition, but it would be able to remove the source data.