It is indeed - it's from a map I'm making intended to show service patterns in the Thames Valley area (including regional bus routes). Progress has stalled somewhat but I will post the full map once (if) finished.
New to forum, having lurked for a while, just registered. I wonder if you would mind my asking a question about your avatar pic. It seems to show a diagrammatic representation of all rail paths passing through RDG. Does this come from a larger map of railway paths and, if so, would you be able to point me to a link to download such a map?