Support Note - Correct Corrupted TINs in LandXML files

Some imported LandXML (or other) files contain corrupted TIN structures with unreported holes. This can cause issues when calculating f.ex. a road model or similar.

Sometimes it is possible to visually confirm these issues by viewing the surface in a Plan View, and then to choose the Draw All presentation setup. You may see some dots and shapes on the surface that you didn't expect.

To improve this:

With these settings the retriangulation will break up the TIN to only points and retriangulate the points. This could cause the triangulation to look different than the LandXML input file. Because of this we have also set the task to use the TIN edges found in the input as breaklines. As an effect the Ground Surface task should produce identical TIN structure to the input, as long as non of the data from the input are overlapping.

Long triangles outside of the original surface

The output from this process may cause triangles to go outside of the original data. This is because the triangulation only consider the points and the original surface triangle edges.

To improve the results you could either