This, especially because you're solutioneering without an understanding of how this work currently happens. Or, more specifically, why it doesn't happen. A re

This, especially because you're solutioneering without an understanding of how this work currently happens. Or, more specifically, why it doesn't happen. A recent popular press article: https://www.bloomberg.com/news/features/2017-08-10/nobody-knows-what-lies-beneath-new-york-city https://www.bloomberg.com/news/features/2017-08-10/nobody-kn... Underground? If the actual city can't get the data, how will you? Inside walls? It's cheap and easy to make a hole and look, to make a lot of holes and look, tear down a whole wall and look. Manual labor is cheap. Building the data up would be great if you had all the manual labor necessary to do it, but based on the Bloomberg article you'd never legally get access to the most vital spaces in order to compile it fresh for yourself (since the data already exists elsewhere, it's just that most people can't get it). And then it's just as likely the cities wouldn't let you sell it to anyone or use it in anyway for security reasons, just like the utility companies are telling the city.