Support partial_match results from Google geocoding

[Adam Winer]

We drop partial_match results altogether, as terrible results that just mean “somewhere in the country, I dunno” always come with partial_match. But some good results come from that too! I think that a better thing is looking at geometry.location_type; if it’s APPROXIMATE, it’s likely a bad result worth dropping, but if it’s anything else it’s likely OK.

[Adam Winer]

Resolve issue #583: Support partial_match results from Google geocoding

Instead of rejecting partial_match results, reject APPROXIMATE location_type results, which give you (for example) bounding regions for countries, not locations.

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