Præcisionen er dog ikke bedre end placeringen af din internetudbyders ...
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The precision is not better than your internet providers ...
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Hostip.info is a community-powered database of IP mapping. Its REST API is easy to incorporate into server-side code, with several options for the type of output. Check out ourhostip.info API profile, where you can see the mashups already using this API.
Blogama is a new IP geolocation API with streamlined data based on the MaxMind API. Marc-Andre Caron reduced duplication and surprisingly has a database of only 1.2 million records that is still incredibly accurate to the city level. Even better, as Make pointed out, you can load the data into your own database for speedier access. . Our Blogama API profile.
MaxMind is an API of a different sort. Rather than call to a web service, its free version is distributed as a binary. There are open source libraries for common programming languages to access the IP data. Find out more in our MaxMind GeoIP API profile.
Now that you can find your user’s location, what can you do? For starters, how about centering your map mashup automatically on the user’s city? If your site requires registration, why not help fill out that profile? [...]
Read more: http://blog.programmableweb.com/2009/03/31/3-free-ways-to-geolocate-by-ip/
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