"Surprising observation of EX Raid Gym distribution using S2 Cell Level 12"

#PokemonGO: About 2 days ago, I wrote an entry how S2 Cells might be use to distribute how EX Gyms got chosen and I use level 11 to show it, https://redd.it/7lhlk5. There were some comments that they can see only 1 gym when using S2 cells, min&max level 12. At first, I was skeptical that this would show different results because some gyms are quite close to each other, but the results surprises me.This will be a long post, so bear with me.To begin, the data were taken from local groups and Facebook pages where trainers reported getting their EX pass. The data collected start from 11th December, because this is when the EX pass no longer had "field-test" written on it after Niantic's announcement on 21st November that the field test is over. I would like to point out that data observed are limited, not everyone reported getting EX Raid pass.I'm using S2 cell min&max level 12 from http://ift.tt/2DbNohg begin the observation from this first picture from 11th Dec wave, http://ift.tt/2zt73XT , as you can see, no 2 gyms are located inside a single square. Also, if you can see on the bottom right of the map, square 9I and 10I, the 2 gyms in 1 park, fairly close to each other, that I once though couldn't be in separate square even if S2 Cell set to level 12, but I was wrong, both are located in separate square. This park had EX raids happened every weeks with 2 gyms located in separate square, which you will see in 18Dec and 25Dec pictureThis second picture is from the 18Dec wave, http://ift.tt/2BPnyTS , several observations. No 2 gyms within a single square. Also, the EX Gyms in 4K and 3K aren't available for EX raids on 18Dec, but were available on 11Dec. Also observed 7K, 9I and 9L square, where different gyms on same park had EX Raids occurred on 11Dec and 18Dec. This two different observations lead me to hypothesize that within a single square, where a single popular park is located that has more than 1 gyms, the gyms in that park will be rotated as EX Gyms, but if the square has only 1 park and 1 gym, the gym will rotate every other week. In the case of 4K square, only 1 park available which has only 1 gym in it, which is why there are no EX Raid there on 18Dec, but return again on 25Dec wave.The third picture is from 25Dec wave today, http://ift.tt/2ztvYud , an anomaly was observed at 3K, where same gym was chosen, even though there are 2 gyms inside the square, another anomaly is at 5H and 5J square, the park has several gyms inside the park within a single square, but somehow none was chosen in 25Dec wave, this could be either because the other gyms did not meet the requirement to become EX Gyms or trainers that received pass did not report it or something only Niantic can answer. More observations and data needed.I also would like to show EX Gyms distribution of our fellow neighbour down south, Singapore. The data collected from the FB page of Singapore POGO for 25Dec wave only. However, fellow Singaporean Trainers, please double check my observation, I might have miss or add something wrongly, let me know and I will edit itThe Singapore S2 cell with level 12 can be see here, http://ift.tt/2BO95rA . Again, observe that only 1 gyms per square using level 12 S2 cell. Most interesting is at square 12I and 12J, where you can see that 2 gyms, located so close to each other that both got EX Raid invites because they're located in different squares.What can be made from this? Well, for me, it's a chance for local trainer to target gyms on park features inside square that has no EX Raids happened yet. If the theory holds true, you can actually triggered EX Raids and target specific gyms only.This however, will not help your chances of getting EX passes even though you had targeted all potential EX Gyms, that is something only Niantic would know.I would like to know if any of you see similar observations, or different one. Maybe different observation can yield different hypothesis.Sorry for the long post. TL;DR:EX Raid distribution based on S2 Cell Level 12 shows 1 gym per square per ex raid wave. via /r/TheSilphRoad http://ift.tt/2kVCZzt