Data and Maps Download

UPDATE (2pm 5/5/08) - The legend included in all map images downloaded on 5/1 and 5/2 is incorrect. Please delete any maps downloaded on these dates. We have posted new images with the correct legend. Sorry for the inconvenience.

The first round of data collection has finished. However, you may still contribute data to be included in the next version of our maps.

To read about the methods used to collect and process the data please read our project manuscript. If you have any trouble downloading the data or maps, or have a specific data request, please do not hesitate to contact us.