Pokemon GO update expands Nearby feature to “most regions of the world,” adds Sightings

Obviously, that change didn't bode well for those Pokemon GO players who did not live in close proximity to any PokeStops, so Niantic has decided to further work on this feature and make it available for everyone in some form.
Another important change is that Sightings feature has been improved so that players who live in regions where there aren't enough PokeStops will be able to locate Pokemon.
The change is very useful to rural players who will now be able to see nearby Pokemon even when not in the proximity of a PokeStop.
To provide a better experience when searching for Pokémon in the real world, we have also made some changes to the way the Nearby Pokémon feature functions when there are only a few PokéStops in range.

source: Niantic
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