Map-making with a balloon

Here is a very cool project which combines high-tech (digital cameras and online georeferencing software) with low-tech (a helium balloon) to create grass-roots maps.

Balloon mapping is sending a camera up on a balloon, snapping photos, and stitching them into a map. Over the past 18 months, we’ve build a global community of mappers who use balloons and kites to take aerial photos, and our browser application MapKnitter to stitch them together.