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I'm looking for a fast and free web service or local application (this it would be better, a local service with database of street, numbers, city, etc.) for reverse geocoding.

I could use google but is limited to 5000 query per day...

What I m trying to do is convert positions acquired from a gps (1 per second) in addresses. These positions could be more than 7000 per track, and if I have 10 track for example, the mole of data to "translate" becames "huge"..

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You will find free geocoding services limited (in quailty) but commercial geocoders (Google Enterprise, Yahoo JBoss, TomTom) good quality but expensive for number of requests over 100,000+

Geocoding is the process of matching addresses with geographic coordinates. The MapQuest Open Geocoding API designed to provide an easier way to geocode using OpenStreetMap (OSM) data. The Open Geocoding API is based on Nominatim and supports three major geocoding functions: address, reverse, and batch. There is no app key required to use this service.

In your case I would recommend MapQuest Open Geocoding Service

MapQuest have an open geocoding api (based from data from OpenStreetMap)

To do a reverse geocode you need to sign up [Free] for an api key. The you can send requests like

http://open.mapquestapi.com/geocoding/v1/reverse?key=YOUR_KEY_HERE&callback=renderReverse&location=40.0755,-76.329999

for JSON response simply add &json={location:{latLng:{ to the call

http://open.mapquestapi.com/geocoding/v1/reverse?key=YOUR_KEY_HERE&callback=renderReverse&json={location:{latLng:{lat:40.0755,lng:-76.329999}}}

http://developer.mapquest.com/web/products/open/geocoding-service

Resverse Geocoding Examples (as above)

http://open.mapquestapi.com/geocoding/#reverse

if your a coder then see

http://open.mapquestapi.com/media/js/samples/geocoding/reverse.js

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  • Interesting service, but I don't know how much complete is OSM in Italy... I could try.. What I m trying to do is convert positions acquired from a gps (1 per second) in addresses. These positions could be more than 7000 per track, and if I have 10 track for example, the mole of data to "translate" becames "huge".. Ps. all sorry for my english.. i'm trying to learn also that ;)
    – crc_error
    May 22, 2013 at 14:07
  • @crc_error can you add that valuable information to your question please.
    – Mapperz ♦
    May 22, 2013 at 14:08
  • Italy is quite well covered for OpenStreetMap - openstreetmap.org/…
    – Mapperz ♦
    May 22, 2013 at 14:11
  • There is a 15,000/month limit now developer.mapquest.com/plans
    – ow3n
    Oct 21, 2015 at 16:31
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I believe you can use geonames for reverse geocoding.

You can find information about the use of webservices here: http://www.geonames.org/export/web-services.html

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Geocode.Farm provides an inexpensive API that does reverse geocoding. Can't go wrong. You can use it for both forward and reverse requests and get results in jSON or XML. Results are very accurate.

UPDATE: This API actually provides free usage, read their documentation page. It is not only a PAID API.

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    OP asked for free, not inexpensive
    – NULL.Dude
    Dec 3, 2018 at 14:42

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