As I am sure many of you are aware, PostGIS has finally released Version 2.0 and included within this version they have also built a geocoder (see: http://postgis.net/docs/Extras.html).

Although I realize V2 was just released I am curious to know if anyone has had the opportunity to compare other opensource solutions such as gisgraphy.com.

I personally am interested in understanding the differences in terms of speed, features/options, accuracy, and the ease of being able to use ones own dataset(s).

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    i am also interested in it because i develop Gisgraphy :), the tests should be done on the same dataset : i think the built geocoder works on TIGER dataset so it is Us only but gisgraphy is worldwide. the amount of dataset impact the performance, so please test it with a gisgraphy version that only import US. I am available if help or improvements are needed. i have added a tools to compare the relevance of several geocoder, I can added an hosted version of postgis geocoder if needed – gisgraphy Apr 10 '12 at 11:53
  • thanks... I do believe it would be highly valuable to have your comparison site include the postgis geocoder within your results. Also, it would probably bea good idea to add the time each request took to process. – NetConstructor.com Apr 10 '12 at 21:03
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    i don't think so, for instance, the free services doesn't give any sla, only premium. The response time depends on the server and the free service are given as is for high availability and response time (only accuracy is important, the reason why i put the free services is to test accuracy) – gisgraphy Apr 11 '12 at 6:34

Another geocoder to consider is Nominatim. It uses OpenStreetMap data.


For the usage policy of nominatim.openstreetmap.org, please see Nominatim usage policy. MapQuest also provide a version of this API, without the usage limits.

As for comparisons... I have not come across much in terms of benchmarks or a feature matrix to compare geocoding options. Though these links may help give you some addi

Geocoding API's Compared

7 Free Geocoding APIs


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