Today I found the cool topic called "Site Topology - Part One Anyway" from the CivilCommunity; Topology is the algorithm to model the real world, after you create the topology, you can do the spatial analysis have the shortest path analysis, buffering analysis, line-of-sight analysis, etc.. Anthony demonstrate

For this thread, I would like to show the Autodesk Revit Building topographic function; basically it support 3 different approach for generating the toposurface, first is manually sketch point, second is import instance and third is import points ASCII file (.csv). So.... How to model the existing surface and look more realistic? I selected "import instance" and "import point ASCII file" for the testing.

The testing can be splitted into three parts: