All in all the easiest way to handle the Citie's need to know the house number is for them to invest in a $100. GPS unit for their fire trucks. It would be quicker and more accurate. Get with the times City Hall.
PS. That is a $100 unit not $10,000 unit. That is all that is needed for the purpose. And go buy it at Wal-Mart,not some overpriced buddie's Store.
Problem solved,simply!
See if they do it. My money is on they will not!