Surface.byperimeterpoints not following perimeter points

[jochem.kolthof]

When a point is very close to the perimeter of a surface as here with point 8, the surface becomes bigger than the perimeter. While this point is not intersecting the surface. (grey area)
when I removed that point it is generating a good surface (blue area)
When I scale the surface with a factor 1000 it is going well with both areas.

Is this solvable.

[Draxl_Andreas]

Hello,

What do you try to create? toposurface?

KR

Andreas

[jochem.kolthof]

Hi,

no solids from 3d BAG (3d building information from the netherlands).

[jochem.kolthof]

here another one.

[jochem.kolthof]

if I make the z coordinates all the same value there is no problem, which makes me think the surface needs to be at least flat.