Is there some centralized source of broadcast coverage maps I miss?

I’d love some assistance in finding such a source, if one exists.

I’m interested in the broadcast radius of several local commercial and public broadcasting stations. Googling does reveal maps for stations kind enough to offer such information, but this is a tad hit-and-miss. I’m thinking of, say, individual images that, in a bygone era, might have been presented as overlays on a hanging map. Does this sort of thing exist in a publicly-accessible format?

I’ve found that gettilng maps, detailed maps, on the “Net” is becoming more and more difficult.
I cannot believe that being allowed to access to detailed maps (without paying) is dern near impossible on the Net.

FCC FM and TV service contour maps

You could also generate your own maps.

That’s absolutely perfect. Thanks so much.