Finding City and Zip Code for a Location

Question

Given a latitude and longitude, what is the easiest way to find the name of the city and the US zip code of that location.

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Answer 1

If you call volume to the service gets up too high, you should definitely consider getting your own set of postal data. In most cases, that will provide all of the information that you need, and there are plenty of db tools for indexing location data (i.e. PostGIS for PostgreSQL).