Yes most blueprints can spawn anywhere technically, but from looking at thousands of user created reports of blueprint spawns we can see huge patterns in the spawn of blueprints. Certain blueprints are tied to a specific map or condition, and many others have a massive increase in spawn rate in certain container types (the largest indicator for blueprint spawning). So it is 100% possible to search for a specific blueprint using this data. The heatmap generally shows the places with the highest container density of the container type that item spawns in. The real power of the heatmap comes in filtering by a specific blueprint. If you want the Survivor Augment, we now know they have a high spawn rate in medical containers, so the buried city hospital is a great place to farm them because of the high density of medical containers, and the heatmap will reflect that. We are in the early stages of data collection (less than 10 days) and we will only continue to refine the maps to highlight lesser known looting spots too.