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Today at Where 2.0 Yahoo announced the release of Placemaker, a new "geo-enrichment" platform. The freely-available platform, which includes an API (our Placemaker API Profile), enables developers and publishers to make applications and data sets location-aware by determining the "whereness" of unstructured content (such as blog posts, new articles, feeds, and web pages).
Almost every app that uses a mapping API needs latitude/longitude points. To get geocodes you need to convert an address to a point on the earth. That's where you'll need one of the 54 geocoding APIs in our directory. This post covers seven free geocoders and compares them on several aspects.
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