2017's article from the same author [1] about Goggle Maps' use of photogrammetry and other building scanning techiques was, in my opinion, one of the most interesting HN submissions ever (its comment section[2] is also worth a read).
[1] https://www.justinobeirne.com/google-maps-moat [2] https://news.ycombinator.com/item?id=15965653