I am already running an OGCServer (mapnik) with an postgis database.
I want to also run pgRouting on preferably the same database, so that I do not have to maintain two separate databases.
I understand that pgRouting adds/changes some requirement to the data model. My question is basically - does it change the requirements in an incompatible way, or does it just add requirement.
(As you might guess; i'm still quite a newbie at pgRouting)