How to remove the loops from a surface?

[Anonymous]

Good Morning everyone !

Today's Question is as mentioned above, How to remove the loops from a surface?

Let me explain you,

I have a surface created from the points. Eventually it has got many ups & downs in the elevations, so I did delete some of the points from the surface. And due to this, some loops are developed inside the surface itself with the closed boundaries.

I also tried to draw surface lines in those loops, either they get shorten or gets enlarged but does not completely vanishes...

Can anybody please put some light on this...?

[Neilw_05]

I don't think many users will understand what loops in a surface are. That is not a commonly used term to describe surface problems. Can you post a screen capture or even your surface model?

[nilesh33]

Hi,

What I understand from your post is "there are closed boundaries (inside the suface) created due to removing of points from the surfaces".

Toavoidthesame, insteadofremovingthosepointsjusteditthereelevationstomatchwithelevationsofcorrectpointsnearertothem. Basicallyyouneedtoapplytriangulationprinciples.

[nilesh33]

Hi, What I understand from your post is "there are closed boundaries (inside the suface) created due to removing of points from the surfaces".

To avoid the same, instead of removing those points just edit their elevations to match with elevations of correct points nearer to them.

Basically you need to apply triangulation principles.

[Anonymous]

Please see the attached snapshot...

[DaveM]

You can fill those in with show boundaries. I use the data extraction to extract all the boundaries from the surface, then attach the interier boundaries that should not exist as a show boundary.

[darreng_oa]

as you know, the circle is outlining an area that has no interpolation, or no data.  if you are comfortable interpolating bw the surrounding survey points, then I would rec just adding a line bw points you feel represent the surface.  Is it possible to modify the points instead of deleting them based on survey notes? 

Hope this helps, Darren

[Neilw_05]

When you deleted the ponts, did you delete the triangle lines also? Deleting points should not cause holes in the surface like you have. When you delete a point, the TIN re-triangulates to the next nearest points. It appears to me you have somehow deleted the triangles in that area.

In your surface properties do you see any deleted lines in your edit history? If so, try disabling those edits and see if the hole goes away.

[ericcollins6932]

You created voids in your surface. Add lines under Edits to put the TIN back.

[Neilw_05]

There should be no need to add lines or show boundaries if the surface is edited properly. Run some tests and see what happens if you only remove points from a TIN. The lines should re-triangulate to the nearest adjacent points.