I have an overly complicated Topography with two phases and lots of splitting and merging through the last months.
At one time I split the topography 2 meters in from the property line. Now the property line has moved due to a arrangement with the neighbor and I need to merge those two surfaces just to split them again in a different line.
I get the error: The two surfaces you are trying to merge are disconnected from one another. They should overlap, or at least share edges.
I have tried moving the points at the edge slightly onto the other surface so there is a visual overlap. No luck.
I could copy a part of the existing surface to the future surface, but all my splitting and merging has left a hole in the existing surface. To close that hole I need to split the future surface and merge that with the existing surface.
Trying that I get either the error: The splitting boundary drawn would result in a self-intersection of the surface boundary. Please edit your splitting lines to correct the problem.
Or if I lengthen the line so it is far outside the Topography: The splitting boundary must split the Surface into exactly two pieces.
In both cases the line clearly splits the surface in two parts.
Merging the surfaces in one line far left
Splitting the surface
I have learnt a lot from this project and some things will definitely be done differently in the future.
An alternative to repairing/merging the existing split toposurfaces is to export the current toposurfaces to a DWG file and use that uncombined geometry to create a new single toposurface using:
Modify | Edit Surface tab, click Tools panel | Create From Import drop-down | (Select Import Instance).
If you have several phases from graded regions, this will have to be repeated for each phase and may not report the same quantities of cut and fill.
After importing, the toposurface points at the previous non-matching limits and coincident limits will be doubled, which may require some cleaning up. Then you would then have to re-split that toposurface according to your needs as well as transfer the building pads and any other subregions.
A personal workflow is to keep a working view with fill regions of the various shapes that I've either split or subdivided as well as building pads to plan the sequence of merging or modifying the limits. As you might know, Revit doesn't like overlapping subregions or building pads.
I would also like you to clarify if you've been:
Good luck,
-luc
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