Careful what photos you tweet--and where you were when you snapped the shot. There's another site designed to warn you against the hazards of over-sharing. This time it's not related to active location-sharing, but instead accidental. The meta-data stored in your photos may be giving away where you live.
This article presents an introduction to and tutorial on apilayer's positionstack, a forward and reverse batch geocoding REST API. positionstack has more than two billion addresses worldwide in its database. And, its service scales to manage more than one billion geocode API lookups per day.