Fast GIS data store, spatial index, and realtime geofence. (Please contribute your use case to https://github.com/tidwall/tile38)

MrGeo (MapReduce Geo) is a geospatial toolkit designed to provide raster-based geospatial capabilities that can be performed at scale. MrGeo is built upon the Hadoop ecosystem to leverage the storage and processing of hundreds of commodity computers.

JavaScript Geo visualization and Analysis Library

Nat Geo Food Hackathon May 2014