The LocationIQ Direction Service Curl Sample Code in beta stage demonstrates how to access the API and provides a mapping guide based on work by the OSRM Project. OSRM is a C++ routing engine for the shortest paths in road networks.
To learn more, visit Open Source Routing Machine.
Data marketplace InfoChimps continues its march to API-ify its most useful, sliceable datasets. The latest is a bundle it calls the InfoChimps Geo APIs and it makes available some extremely interesting location data from both public and private sources. The company has created a location data schema to unify sources, which include several place databases, Wikipedia articles and Zillow neighborhood boundaries.
The limitation so far has been that users and developers usually have to wait for the big players like Google, Yahoo and Bing to add the relevant information to their maps.
CloudMade has conveniently side stepped this issue by allowing its maps to be collaboratively edited, making it a kind of “Wikipedia for maps”. The results have been quite impressive, as TechCrunch reports.
PubSubHubbub. Say that three times fast. If you're not familiar with PubSubHubbub, it's an extension of the RSS and Atom protocol that allows the feed to push content out when it's updated. That's just the sort of technology we should see from check-in APIs like Foursquare and Gowalla.