warren 783 research notes and 10141 wiki edits | Joined over 6 years ago | Admin

The creator of GrassrootsMapping.org and co-founder and Research Director for Public Lab, Jeffrey Warren designs mapping and community science tools and professionally flies balloons and kites. He leads the coding community at Public Lab, and has developed the vector-mapping framework Cartagen and grassroots mapping tool MapKnitter, as well as open spectral database and toolkit Spectral Workbench.

He is on the board of of the Open Source Hardware Association and served from 2015-17 as Vice President, is on the board (since 2014) of alternative education program Parts and Crafts in Somerville MA, and an advocate of open source software, hardware, and data. He co-founded Vestal Design, a graphic/interaction design firm in 2004, and directed the Cut&Paste Labs project, a year-long series of workshops on open source tools and web design in 2006-7 with Lima designer Diego Rotalde.

Jeff holds an MS from MIT and a BA in Architecture from Yale University, and spent much of that time working with artist/technologist Natalie Jeremijenko, building robotic dogs and stuff. To find out more, visit Unterbahn.com.

Photo by ChristopherVillafuerte.com CC BY-NC-SA 4.0

134 questions asked

4156 comments posted

74 activities posted

13 activities attempted

View these maps at MapKnitter.org »

Title Creation date Image


Comment Last activity Moderation
"The interface is really minimal at the moment, but i'm planning to make it save settings soon. But by "batch at the bottom" i mean that if you drag..." | Read more » about 2 years ago
"@xose if you're testing any fisheye-lensed cameras please give it a try as well! " | Read more » about 2 years ago
"Hi, @patcoyle - managed (with some help) to get the web-based lens distortion removal system working, and worked out some rough settings for Mobius..." | Read more » about 2 years ago
"OK - the GoPro clones can be corrected with: a: 1, b: 1, Fx: 0.16, Fy: 0.16, scale: 1.087, x: 1, y: 1 Before: After: The Mobius (with defau..." | Read more » about 2 years ago
"This was solved today by SpaVec! https://github.com/jywarren/fisheyegl/issues/3#issuecomment-315491151 The demo is updated: https://jywarren.gi..." | Read more » about 2 years ago
"What are you hoping to measure with it? " | Read more » about 2 years ago
"Here are a couple leads! https://publiclab.org/notes/cristoforetti/06-22-2016/webvalley-2016-improved-compact-spectrometer https://publiclab.org/..." | Read more » about 2 years ago
"Wig Zamore posted this on the main publiclaboratory list: Hi Jeff and Everyone - Two papers you may want to look at, both open access. One by S..." | Read more » about 2 years ago
"Also, Caroline, it might be worth posting a second question (linking to this one maybe) specifically seeking collaborators in the DC area -- i can ..." | Read more » about 2 years ago
"Hi, Caroline!! I agree with Chris - though if you're looking to download data (either as you go or once you're done) to a phone easily, you might ..." | Read more » about 2 years ago
"(sorry, i meant i see data on the link at Sparkfun) " | Read more » about 2 years ago
"For starters, i see some data; was it working at one point and then stopped? And if so, (apologies for a dumb question) what were the things that ..." | Read more » about 2 years ago
"Great, we have a few options. We could try to connect your Pi up for remote access instead of relaying back and forth, or you could send me your co..." | Read more » about 2 years ago
"Hi! sorry I missed this -- are you using a Raspberry Pi to run OpenPipeKit? If so, are you sure it's well connected to the internet? There could b..." | Read more » about 2 years ago
"Hi, I'm guessing you're using a DIY #spectrometer? What are you trying to take an image of; is it possible there's a blue protective cover on the l..." | Read more » about 2 years ago
"Hi, @rockets -- maybe refining the title could be helpful here; I hope you don't mind but as I'm an admin, I changed it to How accurate are KnowFlo..." | Read more » about 2 years ago
"Hey @abdul - I think I found the answer (thanks to @pdhixenbaugh) -- in the waterquality list archives (a post by @mathew): https://groups.google...." | Read more » about 2 years ago
"Also note connection to this question: https://publiclab.org/questions/warren/06-21-2017/test-images-for-multispectral-image-processing " | Read more » about 2 years ago
"My hunch is that since we can't display negative values for pixels, all negative values in the "high-contrast" image are being zeroed out, but in t..." | Read more » about 2 years ago
"Hi, Ned - i'm not asking about calibration at this point, just for a way to empirically test (in the sense of automated testing -- https://en.wikip..." | Read more » about 2 years ago
"Part of the exciting part of this test suite (that we posted a request for here: https://publiclab.org/questions/warren/06-21-2017/test-images-for-..." | Read more » about 2 years ago
"Can we get a better look at that gorgeous Rokaku?! Is it hard to travel with? " | Read more » about 2 years ago
"Great advice on the "tilting" fix -- this affected one of Liz's squids and we struggled to adjust the bridle, eventually giving up. I posted this ..." | Read more » about 2 years ago
"Deleted some spam! " | Read more » about 2 years ago


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