Start from scratch
I checked the FCC maps for my address. My house has no service. My rather large shed in the back yard has service as Bldg2 appended to my address. My address locates to a two-family house across the street and west by one house. My address appears with both the correct "city" and that of one 2-miles away and both variations have the additional Bldg2 appended. All those errors for one address and we haven't even bothered to check accuracy of broadband availability, what's the point? This situation is not isolated to my address, nearly the entire village has the same types of errors, and very few accurate addresses. This for a small village of around 500 addresses in under 2 square miles, I wonder how well it scales up for larger areas of higher and lower population densities?
A quick glance at the supposed broadband availability indicates it is no better than previous FCC maps. There are no fibre-optic lines in the neighborhood, POTS lines are barely maintained and there is no DSL booster between here and the switching office miles away (so not broadband), cable internet is the choice via Comcast, fixed wireless is available but topography limits greatly (maybe broadband), 5G home internet is just becoming available, oh and we do get satellite 'round these parts.
You cannot build on a bad foundation. Maps have to have accurate addresses to be useful. I believe the paper variety may have been better. There seems to be a notion that gathering all address info from all sources and blending it together will be the best and most accurate. Um, no, that is how you take a reasonable map and introduce the very errors the mapmaker was striving to avoid. The US Postal Service is believed to be the authority on US delivery physical addresses, they are not. The USPS is the authority on USPS mailing addresses. The USPS does not deliver to all US physical addresses. Other delivery services do, but they have trouble consolidating their knowledge and some even used the USPS for address validation on their websites. Emergency services represented by 911 is another highly accurate source of physical addresses even where deliveries may not be made, but there is little consolidation across emergency management centers.