I'm working on an app that will display drugstores in a map. I have a table that has all drugstores, each with its Lat/Lon.
We used several different sources to add the data to the table: the Walgreens location app, Waze, Google Maps, among others. Naturally, one location can be in all three sources, so there are many duplicates.
The problem is that one specific location may be in Waze and the Walgreens app, but they both have slightly different coordinates.
How do I determine if two sets of coordinates are for the same location? Is there a "difference" I can calculate and then determine if they're different locations?