Create Terrain From Graphical Filter
Graphic Filter Manager
Filter Feature Type = Break lines
Civil Features selected include mesh that is to define terrain. The mesh is created from a template for a road that has points that run along the top of the surface and points that are directly below those points.
Sometimes the top of the mesh is used and sometimes the bottom is used.
In the attachment, the green shapes represent the pavement and the red lines represent triangles of the terrain that gets created.
Keith,
If you are wanting to use the Graphical Filter to create a Terrain, it could be that you need to add more information to the Filter for it to know what to include/exclude. If you look at what Bentley provides in our workspace for Filters, you can notice that it will Filter a Break Line Feature, then select within that category specific Feature Definitions to use. Please let me know if there is a specific problem you are running into. Maybe provide screenshots for how your Filter is setup and how it is not working as you'd expect. I could help to see what you might need to add or remove to the Filter to get it work for your purposes.
Holly
For more information about the Road and Site design tools, visit the Road and Site design WIKI at: http://communities.bentley.com/products/road___site_design/w/road_and_site_design__wiki
A terrain model is a surface where you can't have same XY with different elevation. It means that the triangulation includes one or the other. There is nothing that tells the software to pick the highest. So you should remove meshes to only keep what must be included. Sometime you can also set alternate surface to points of the template to get required features in a terrain model.
My goal is to create a surface comprised only of pavement elements. The reason I chose to use meshes in my graphical filters is because it created the best boundary. Otherwise, I would use the linear features as break lines.
When I use the linear features (pavement lane lines), the boundary is not recognized. The features I use for my boundary are the edges of pavement linear features.
When I select both component meshes and point linear features for break lines, the boundary works. All of the elevations seem to be honoring the linear features (at the top of pavement) except the boundary point on the right side of the corridor. It still uses the bottom of the pavement instead of the top.
Use of Alternate Surfaces crashes when I Create Terrain From Alternate Surfaces.
Upon further inspection, not all of the elevations are honoring the linear features.
Is there a preferred method for establishing the boundary? I do not want to use a sliver or triangle length to try to set the boundary. I need a boundary that follows the edge of pavement exactly.