I have a large point cloud attached to my file that has point shots for everything on the same classification. Therefore, I cannot turn off everything besides the ground shots to create a terrain surface for the existing ground of my project area. When I try to create a terrain from point cloud, it fails to import and gives the error message that "Terrain state is invalid - Terrain MUST be valid and triangulated for this tool." I have attached an image that shows the point cloud and the properties of it that show the classifications. How can I work around this error to create a terrain surface of the ground excluding the trees, poles, etc?
You can have a try to use Ground Extraction to create the STM (scalable terrain model) and tin file. Export STM to OpenRoads terrain model or import TIN files will allow you to have OpenRoads terrain model for further use.