Lo-Fi, cheap, and crowdsourced aerial mapping
Grassroots Mapping is a series of participatory mapping projects focused on analyzing changes in the environment, recording ephemeral events (such as the occupy movement) and helping communities involved in land disputes.
Initiated by the MIT Media Lab's Center for Future Civic Media, the project utilizes balloons, kits, and other simple and inexpensive tools to produce aerial imagery, inverting the traditional power structure of cartography.
The resulting images are geotagged and stitched into maps which are 100x higher resolution than those offered by Google.
Cameras, GPS, and USHAHIDI platform