I'm using pgRouting and I'm going through the manual (Release 2.1.0) and in chapter five, it says:
• pgr_createTopology - to create a topology based on the geometry.
• pgr_createVerticesTable - to reconstruct the vertices table based on the source and target information.
When I run them, I get the exact same outputs. Both pgr_createtopology and pgr_createverticestable give me a new layer public.network_vertices_pgr with:
As far as I can tell the two functions are doing the exact same thing, and it would be redundant to run both of them, I just wanted to see if there is a difference that I'm overlooking.