I've used MongoDB on a project for the City of Chicago with great success. I was impressed with the fact that we can store JSON documents in one giant collection, scale horizontally by just adding new nodes, the plethora of language APIs (Java,AS3) that can talk to it, run MapReduce tasks, and my favorite is that you can create a true spatial index on a document property.
So… Google introduced an offline feature to their mobile mapping application, enabling you to view map tiles when you are disconnected from the network. This is pretty neat and very useful now that local storage is so “abundant” on mobile devices. In this post, I would like to show you how to use the mobile device local storage for offline tile retrieval using the ArcGIS API for Flex.
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