location of collectables
We live in an area with no inns, greenhouses etc.
There are schools and shopping centres near is, fairly new buildings. Do not think its part of the algorithm used to place inns.
Can players not assist by having beta access and update popular areas that does not appear on map
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Answers
The POI are from the same dataset that Niantic's other games are based on - and K12 schools are EXPLICITY labeled as "not POI worthy".
In general, POI are places of:
value.
Economic value on its own does NOT make a good POI.
And POI must be HUMAN CREATIONS... an ancient tree is not POI worthy.
Also, keep in mind that the overwhelming number of POI aren't created by algorithms, they have been submitted by players (originally Ingress-players only, recently Pokemon-Players have joined) and have been curated by players (Ingress Players only, google "OPR" for more info) - to ensure a certain quality of POI.