hold triangulation within surface boundary

[torpedo99]

what is the trick for holding triangulation within a surface boundary?  I recall a setting somewhere but can't seem to find it...   attached graphic, would like to hold the surface triangulation within the arcs which are in the surface definition as boundary

thanks,

[Joe-Bouza]

Not sure what setting you are looking for but a boundary would stop the triangulation across the chord. Perhaps the longest triangle setting is what you are thinking of. that would set the boundary in lieu of manually drawing one

[neilyj666 · Accepted solution]

Looks like you may need to change supplementing distance mid ordinate distance when adding breaklines which will define the curve better

[Neilw_05]

This may not solve your problem but it is worth noting that when adding the boundary to the surface definition you should enable the "non-destructive breaklines" option in the dialogue. That option ensures that the surface retains the triangulation precisely at the boundary. Essentially it is like clipping the TIN with a cookie cutter. If you leave it off the triangulation stops at the closest triangles that fall within the boundary. That usually results in gaps between the TIN and the boundary.

[AllenJessup]

Make sure the Boundary is at the bottom of the operation list.

Allen Jessup

[torpedo99]

thanks everyone, all suggestions were helpful

noted the mid-ordinate distance can also be set when adding a boundary