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Over the last year, we’ve build a global community of mappers who are engaged in civic issues with low-cost mapping tools like balloons, kites, and remote-control airplanes.
Residents of the Gulf Coast are using balloons and kites to produce their own aerial imagery of the Deepwater Horizon oil spill… documentation that will be essential for environmental and legal use in coming yeas. We believe in complete open access to spill imagery and are releasing all imagery from the oil spill mapping project into the public domain. Browse maps and data from the Gulf Coast in the Public Laboratory Archive
Check out the community blog at http://grassrootsmapping.org/
Do you have a site in mind which you'd like to map? Looking for collaborators or just need some tips and advice?
- Join the mailing list -- it's full of people all over the world who are offer advice and support
- Contact Public Laboratory staff directly
When getting in touch, be sure to mention:
- the coordinates of the site
- context; what you'd like to use the data for
Assemble a balloon kit
- Download the 4-page illustrated guide to balloon and kite mapping - including a parts list and flying tips (other languages here)
- Balloon Mapping Materials - Read this page for a full listing of materials. At minimum, you'll need:
- at least 1000 ft of string on a spool
- a cheap digital camera with "continuous mode"
- a balloon or kite
- a rubber band
- tape & scissors
- leather or cloth gloves
- The illustrated guide (above) includes lots of tips for a successful flight; print it and bring it with you!
- Be sure to review the Balloon Mapping Regulations for the US, or the equivalent wherever you are planning to map.
- Try to launch your balloon to at least 1000 ft for a good compromise of high resolution vs. large area
- Stay away from power lines, airports, and traffic
Sorting and stitching images into maps
- Take the next steps: review the Upon Return page
- Contact the Public Laboratory team to get your images hosted on MapMill.org, and reach out to the Grassroots Mapping mailing list to get help sorting them.
- Use Map Knitter to stitch your photos together into maps online and export them in GIS formats
- Image Analysis - Try some of these techniques for bringing out detail and compositing your images with near-infrared imagery.
- Kite mapping - A large kite photography community exists -- find online resources and a list of recommended kites.
- Ground Control Point Targets can help you figure out how your images fit together if there are not good pre-existing maps for your site
- Infrared Balloon Mapping - Balloon mapping with a modified camera which takes infrared pictures. Good for identifying vegetation and its health.
- Hydrogen ballooning - don't try this yet, but we're looking into this for places where you can't get helium, or it's too expensive. balloon-mapping