"Revisiting Tangela (and enhancing our spawn knowledge)"

#PokemonGO: First of all, I know Silph hates anecdotal. But please bear with me. A month ago, fellow Tangelaless Canadian u/PokeProfMaple created this thread. Lots of great comments, unfortunately most of them coming from people in "Tangela" biomes. Anecdotally, I have more info to add...I have caught 13,000 Pokémon, and have never seen a Tangela nearby. It is the last Gen 1 I need. My experience is consistent with the user I mentioned from Alberta. Obviously, this lends itself to the fact that Tangela is a latitudinal spawn. HOWEVER...My brother, (I warned you this was anecdotal) lives in the same city as me, has caught half the number of Pokémon I've caught, and has caught 3 Tangela in the wild, all near his apartment. There is no way this is simply RNG. So lets look at the data.Here is my brother's neighborhoodHere is my neighborhoodFirst thing I'm theorizing: Tangela absolutely does not spawn in residential neighborhoods above a certain latitude. Also, I live with a community centre, park, and ponds in view. And in 9 months of looking at Pokémon Go every single day/night a Tangela will not spawn there.I also thought, it must have to do with the river or park biome he's next too....except the Tangelas aren't spawning there...they're spawning in one of the following OSM "biomes": Industrial area, Building, Minor/unclassified road/tertiary road/ or unmapped. Luckily, my brother sent me a screenshot of Tangela nearby...I needed to find out what biome that Pokestop was in. So off to Ingress Intel I went. Upon zooming in, I realized that the stop actually doesn't touch the building...it's mapped just outside of it (because Niantic doesn't want spawns in buildings). Heading back to OSM I tracked down the exact location of the stop, and lo and behold there's a small strip of purple (industrial area) which appears to be exactly where the stop is.My theory: Tangela, though still rare, will spawn in the Industrial Area biome. This may be because Industrial Biome's have more of an element of randomness to them as compared to water or park spawns. Anecdotally, my brother has also seen a Mareep around his place, which as far as I know also doesn't spawn by water or parks.TLDR: I postulate that Tangela will spawn in the Industrial Area biome but not the residential, community centre, pond, or park biomes North of a certain latitude.Hope this info helps some other Northerners. I hope it also peaks curiosity in the randomness factor attributed to each biome. I postulate that parks, ponds, and rivers have a lower amount of "random" pokemon spawning than other ones like Industrial area do.Edit: to fix a link. via /r/TheSilphRoad http://ift.tt/2mR2H8h