I am creating a terrain from elements (3D contours) using the following settings:
Feature Type: Contour
Edge Method: Max Tri Length
Max. Side Length: 200'
Feature Def: Existing Contours
Name: Existing Contours
The only elements in the file are located north and east of coordinate 940,000, 625,000.
This all works fine except that when the terrain is created, the boundary results in a sliver that extends to 0,0,0 (roughly 1,130,000' to the southwest). The sliver does not appear to be controlled by Max Side Length as it is 65' wide at the graphic elements.
How can this be corrected?
Thanks in advance!
Is the original data DWG based? I have seen this before, and I 'solved' it by selecting the 'element' (inserton point?) at the origin and deleting it from the terrain.
Negative. The topo from which the terrain was created was referenced from a shape file and the contour elevations were maintained when the shape file was clipped and merged into the DGN. There is no element at 0,0,0 (only the terrain boundary line). Not one that I could select or find using a window anyway.
Is there a way to redefine a vertex on the terrain boundary?
Can you not edit the terrain and delete the point/vertex that is wrong i.e. 0,0,0 - rather than redefining it?
I think the idea here is that there is no point at 0,0,0. Or at least, that was the case for me, and I think he's seeing the same thing as I did on my project.
Yes, there is no element (that I can locate) at 0,0,0. The terrain boundary obviously has a vertex at that point and I cannot seem to affect it. If it could be moved (e.g. using DTM tools or Edit Terrain Model tools) it might solve the problem, but that doesn't seem to be possible. I successfully deleted the vertex using the 'Delete Vertex' tool from the Edit Terrain Model tools but when I fit the view, it still appears to be finding something at 0,0,0 (resulting in a 600,000'x980,000' view area!).
I also tried the 'Move Vertex' tool but it will not move that vertex.
I also tried the 'Delete Triangle by Line" tool and it had the same result as 'Delete Vertex'.
I think that I can work around it, but the reference to 0,0,0 when fitting the view and the reference to elevation 0, when the rest of my terrain is up around 2100', is quite annoying. I also have concerns that the scale of the terrain may be affecting performance.
One path I haven't tried is to export the terrain to a TIN, modify it with the DTM tools (if possible), and then recreate the terrain from the modified TIN...but that seems like taking two steps back.
Thanks,
Tony