That's interesting! My friends who were avid Ingress players totally repeated the story that at least the geospatial data was somehow reused directly (to generate points of interest automatically based on places that figured into Ingress gameplay). It would be interesting to hear to what extent that was a misconception.
The POI is indeed reused from Ingress. For a very long time the only way to get a new POI in Pokémon GO is to make a new portal in Ingress and it will sync over.
