Does someone know if i can use the top points and bottom points in one pointgroup to build a top surface (in blue) and a base surface(in green)?
Is there a node that i can use to select the Cogopoints not a whole pointgroup which i want to create surface?
split the points into pointgroups and use the pointgroups to create the surfaces
is thers a Dynamo node whicht i can use?
Civil 3D toolkit, cogopoint extensions under land development. You could filter your selection (using lists) by elevation and then create the groups based on elevation and create the surfaces using the newly created groups
or just use civil3d, don’t overcomplicate stuff dynamo, is not needed in this situation
Hi Do you have idea how i can here filter the top and bottem points automatically not each index of points with highst or lowst elevation manually type? For huge number of points is it impossible 
this looks like the geotechnical modeler civil 3d
