topic Re: Surface Gaps after Pasting - Show Boundary Not Helping in Civil 3D Forum

Surface Gaps after Pasting - Show Boundary Not Helping

amistrettaA58GX — Thu, 15 Jun 2017 22:33:38 GMT

I'm trying to develop a composite surface showing the proposed roads pasted on the existing ground. I've created the clean composite surface and pasted the existing surface and the proposed roads surface. However, over the majority of the area, I've ended up with gaps between the proposed roads, which should show the existing surface. I've tried setting the gap outline as a Show Boundary, but when the surface appears in the gap, it seems to be a triangulation between the extents of the gap and not the original ridges and valleys on the existing surface. What am I missing? See attached screenshots.

Re: Surface Gaps after Pasting - Show Boundary Not Helping

MMcCall402 — Fri, 16 Jun 2017 00:16:37 GMT

Hmm, paste the existing into a new surface then add the inner boundary from the proposed to as an outer boundary. Then paste that surface into the composite to fill the gap with the existing surface.

Re: Surface Gaps after Pasting - Show Boundary Not Helping

amistrettaA58GX — Fri, 16 Jun 2017 00:23:03 GMT

That's the first thing I thought of... This is what I get (see attached). I understand the corridor surface is based on frequency and the existing surface is based on an aerial grid, so of course they won't meet perfectly, but I've never had this happen. If you look to the right in the screenshot, the other area pasted just fine.

Re: Surface Gaps after Pasting - Show Boundary Not Helping

Jeew-m — Fri, 16 Jun 2017 02:50:16 GMT

Dear Friend,

Have you added a boundary to the corridor surface such as 'corridor extents as boundary'?. If not please have a try with that.

Thanks

Re: Surface Gaps after Pasting - Show Boundary Not Helping

amistrettaA58GX — Fri, 16 Jun 2017 15:10:31 GMT

Thanks Jeew-m. Yes, each corridor has the below "Corridor extents as boundary" shrinkwrap boundary. Since the roads formed loops, I added the corridor boundaries upon development to keep the surfaces from triangulating across the center of the loop. See screenshot.

Re: Surface Gaps after Pasting - Show Boundary Not Helping

neilyj666 — Fri, 16 Jun 2017 20:49:44 GMT

@MMcCall402 wrote:

Hmm, paste the existing into a new surface then add the inner boundary from the proposed to as an outer boundary. Then paste that surface into the composite to fill the gap with the existing surface.

Try adding the inner boundary from the proposed as a breakline to the pasted existing before adding as an outer boundary

Re: Surface Gaps after Pasting - Show Boundary Not Helping

user181 — Fri, 16 Jun 2017 21:44:48 GMT

Hi @amistrettaA58GX. An option would be to make a copy your existing ground surface and use the inner roadway boundary as the outer boundary on the copied surface. You could then paste that surface into your composite.

Re: Surface Gaps after Pasting - Show Boundary Not Helping

neilyj666 — Sun, 18 Jun 2017 11:54:59 GMT

Wasn't this the first suggestion in this thread?

Re: Surface Gaps after Pasting - Show Boundary Not Helping

tcorey — Sun, 18 Jun 2017 15:23:42 GMT

Try this:

Extract boundaries from design surface.

After pasting existing ground, add extracted boundaries to combination surface as non-destructive breaklines.

Paste corridor surface.