"An online venn diagram tracker!"

#PokemonGO: try it here: http://ift.tt/2bChAIX: http://ift.tt/2bCw1rz to use it to track down a Dragonite while walking around:If dragonite is in the nearby sighting, draw a green circle: a green circle means "there is a dragonite somewhere in this green circle"If it is not in the nearby sighting, draw a red circle: a red circle means "there can never be a dragonite anywhere in this red circle"Just walk around and keep adding green circles (click on the map) to zoom in on the dragonite, and adding red circles (use the button to toggle to red then click on the map) to rule out possible regions. The dragonite should be in an intersection of all the green circles, and outside any areas covered by any red circles.Went out earlier today to track down a horsea and a venonat with my friend, so so far it works. It might stop working if we get too popular and I run out of the API quotas haha.Why is this method good:In short, it maximizes information usage by enabling user to add a knowledge of whether a Pokemon is present or absent in the nearbyList at ANY location.Many tracking schemes relies on the fact you can find these "boundary points" where a pokemon goes in and out of the sighting list, and use these boundary points to construct locations to travel to. These boundary points can be finicky to find due to GPS imprecision and terrain difficulties.The venn diagram scheme uses the information available to the user at any location, i.e. whether a dragonite is visible or not in the nearby sightings, and is much more robust that way./u/KingClam2 remarked that the venn diagram method works even when there are multiple spawns and it wouldn't mess up at a nest! Which is a remarkable statement and very insightful.Acknoledgements:Many tracking schemes have been discussed extensively on /r/TheSilphRoad/u/RamblinWredneck and I had a discussion awhile ago to improve his very similar android tracking app (It can do intersection but cannot do subtraction). He sent me his code but it was too difficult to dig through to modify it (android apps are in general pretty difficult to manage and I'm not an expert). So I made this from scratchThis project is open sourced on github so take it use it however you like: http://ift.tt/2bChbqd Plans: Nothing. Gimme some upvotes, clone the repository to improve it and make your own tracker. I'm not intending to further develop this work at all, it's been a fun 3 hour hacking session with 30 minutes of field testing and I hope to end it as that :) via /r/TheSilphRoad http://ift.tt/2c1laM9