For anyone interested in mapping technology, check out the book "Never Lost Again: The Google Mapping Revolution That Sparked New Industries and Augmented Our Reality". Written by one of the founders of Keyhole, the CIA-funded (In-Q-Tel) company that created the technology that became Google Earth, the book describes the creation of Google Maps, Google Earth, and the political machinations of different Google departments vying to own "geo".
https://www.amazon.com/dp/0062673041