Geolocation is one of the most popular subjects for today's web & there are many solutions that help geo-enabling web applications.

YQL Geo Library is an impressive resource for geolocation as it is totally free & JavaScript-based.

It has various powerful features like:

• detecting the visitor’s location with the W3C geo API and with IP as a fallback
• find geo location from text
• find location from lat/lon pair
• find locations in a certain web document (by URL)
• get the location for a certain IP number

The library is lightweight (4kb uncompressed) & non-complicated. It just works by calling a function like:

 yqlgeo.get('217.12.14.240',function(o){   alert(o.place.name + ',' + o.place.country.content +         ' (' + o.place.centroid.latitude + ',' +                o.place.centroid.longitude + ')'         ); }); 

will get you the city, country, latitude & longitude of any given IP.

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Tags: Geolocation, YQL

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