Skip to Content

Balloons Put a Social Spin on Aerial Surveillance

DIY satellite kits let activists make and share their own maps.

It used to be that only satellites, drones, and airplanes could spy on you from above. Now balloon mapping is turning aerial surveillance into a remarkably cheap civilian experience.

a balloon mapper
Up and away: A balloon mapper in Qatar gets ready for launch.

Using a hoop winder and a set of rubber bands and carabiners, would-be balloon mappers can build their own device for cheap. (If a balloon isn’t on hand, kites or small helium-filled blimps will also suffice.) An ordinary camera or smartphone, set to continuous shutter mode, is sent aloft. Later, the pictures can then be sewn together using open-source software like MapKnitter.

Kits are available online for about $100 from the Public Laboratory of Open Technology and Science (PLOTS), an open-source community focused on environmental issues. One of PLOTS’s first major mapping projects tracked the progress of the Deepwater Horizon oil spill on the Gulf Coast. Since then, PLOTS members have teamed up to produce maps of many other environmental hazards, including sewage flows in New York City’s Gowanus Canal and incinerator landfills in Saugus. Last week, the group’s Somerville chapter paired with the U.S. Fish and Wildlife Service to investigate the spread of an invasive species in a Massachusetts lake.

The data created with PLOTS’s kits is freely available online. Their website archives balloon maps from all over the world, along with spaces where members can discuss and critique each other’s work. Some maps are even used to contest official records.

“Maps are often used by those in power to exert influence over territory,” reads the introductory guide on the PLOTS website. “’Grassroots mapping’ attempts to invert this dynamic.’”

Balloon-mapping is one in an emerging group of projects that put aerial photography in the hands of ordinary people. Another, Dronestagram, invites drone hobbyists to share their best aerial shots; the site’s most-liked photos include stunning views of Dubai and the French countryside. Another online community, DIY Drones, offers guides and forums for people interested in building their own Arduino-based device. 

For more info, see our breakdown of how balloon-based space photography works (“How to Photograph the Earth”).

Keep Reading

Most Popular

A Roomba recorded a woman on the toilet. How did screenshots end up on Facebook?

Robot vacuum companies say your images are safe, but a sprawling global supply chain for data from our devices creates risk.

A startup says it’s begun releasing particles into the atmosphere, in an effort to tweak the climate

Make Sunsets is already attempting to earn revenue for geoengineering, a move likely to provoke widespread criticism.

10 Breakthrough Technologies 2023

Every year, we pick the 10 technologies that matter the most right now. We look for advances that will have a big impact on our lives and break down why they matter.

These exclusive satellite images show that Saudi Arabia’s sci-fi megacity is well underway

Weirdly, any recent work on The Line doesn’t show up on Google Maps. But we got the images anyway.

Stay connected

Illustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at customer-service@technologyreview.com with a list of newsletters you’d like to receive.