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The creator of GrassrootsMapping.org and co-founder and Research Director for the Public Laboratory for Open Technology and Science, Jeffrey Warren designs mapping and civic science tools and professionally flies balloons and kites. Notable software he has created include the vector-mapping framework Cartagen and orthorectification tool MapKnitter, as well as open spectral database and toolkit Spectral Workbench.

He is a fellow at MIT's Center for Civic Media, on the board of the Open Source Hardware Association, on the advisory board of Personal Democracy Media's WeGov 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 opensource 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.


Barnstars


CFL detection by contrast, for auto-calibration

by warren | 9 days ago | 0 | 227 views | 0

What I want to do I was thinking we might be able to do a crude but very fast CFL detection by m...

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spectrometer calibration cfl spectrometer-calibration


Spectral Workbench previewing and clipping warnings

by warren | 11 days ago | 1 | 288 views | 2

Just a quick update here - I added a webcam preview to the capture interface (see above) as well ...

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spectrometer fluorescence spectral-workbench oil-testing-kit


Quantifying reflector brightness assistance

by warren | 14 days ago | 1 | 241 views | 1

What I want to do At the New Orleans oil testing meetup, started using reflective foil mylar (li...

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spectrometer reflective cuvette clipping


Oil fluorescence scanning on an Ocean Optics spectrometer

by warren | about 1 month ago | 1 | 431 views | 1

What I want to do At LEAFFEST 2014, Mary, Luisa, and others reproduced the kind of fluorescence ...

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spectrometer vermont calibration leaffest



Better smoothing and equalizing graph height for comparison of oil spectra

by warren | about 1 month ago | 2 | 969 views | 1

What I want to do Based on the difficulties @mathew highlighted in his research note yesterday, ...

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spectrometer oil fluorescence spectral-workbench


Coqui draft board design on Upverter

by warren | about 1 month ago | 6 | 284 views | 0

What I want to do Make a simple through-hole Printed Circuit Board for the Coqui <$5 water co...

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vermont leaffest conductivity pcb


Riffle Coqui hot/cold tapwater test

by warren | about 1 month ago | 3 | 334 views | 1

What I want to do Some people don't drink water from the hot tap, because its sat in pipes and h...

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vermont leaffest water-quality conductivity


Webcam brightness testing for Oil Testing Kit

by warren | about 1 month ago | 7 | 318 views | 2

What I want to do We've had trouble getting bright enough spectra in the Oil Testing Kit with th...

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spectrometer uv fluorescence fold-up



Odyssey magazine piece on Balloon Mapping

by warren | about 1 month ago | 1 | 394 views | 3

Odyssey Magazine is a kids science magazine, and they ran a whole issue on remote sensing recentl...

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balloon-mapping media press odyssey


Ultra micro cuvette tests, UV LED and low-temperature fluorescence

by warren | 2 months ago | 1 | 1,423 views | 0

What I want to do Just posting a variety of small tests I've done over the past few days, based ...

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spectrometer uv temperature oil


Continued literature review for the Oil Testing Kit

by warren | 3 months ago | 4 | 474 views | 2

What I want to do I've been reading and annotating a collection of formal research papers on flu...

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spectrometer spectrum-matching fluorescence heavy-metals


Sample container search

by warren | 3 months ago | 12 | 441 views | 0

What I want to do The square glass bottles we've used for fluorescence spectroscopy are sold out...

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spectrometer fluorescence cuvettes sample-containers



Increasing brightness of fluorescence spectra

by warren | 3 months ago | 7 | 371 views | 0

What I want to do We had some trouble at the recent oil testing kit meetup in New Orleans in get...

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spectrometer kits fluorescence desktop-spectrometer


Survey of different kinds of fluorescence spectrometry, optimizing intensity

by warren | 3 months ago | 13 | 1,053 views | 1

Jargon Learning more about different types of fluorescence spectroscopy -- a common type for oil...

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spectrometer fluorescence pesticides literature


Visible-range fluorescence fingerprinting of heating and motor oil

by warren | 3 months ago | 1 | 359 views | 1

I forwarded this 1992 article, "Fingerprinting petroleum contamination using synchronous scanning...

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spectrometer oil fluorescence matching


Canon SD4000IS as Infragram

by warren | 3 months ago | 9 | 526 views | 1

What I want to do We'd struggled a year ago to get a CMOS-sensor based Canon SD4000IS working as...

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near-infrared-camera infragram rosco red-filter



Equalizing area of spectral graphs for comparison

by warren | 3 months ago | 0 | 370 views | 2

What I want to do During the development of testing techniques with spectrometers in the Public ...

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spectrometer fluorescence spectral-workbench spectral-workbench-api


Recent improvements to PublicLab.org

by warren | 4 months ago | 0 | 364 views | 4

Overview The past few months have been focused on intense coding, optimization, and feature refi...

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website plots2 developers code


Infragram kite mapping at Fab10 Barcelona

by warren | 4 months ago | 12 | 862 views | 0

I held two workshops at Fab 10 (http://fab10.org) where we launched an Infragram Point & Shoo...

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near-infrared-camera kite-mapping barcelona spain


Spectrometer slit width thoughts

by warren | 4 months ago | 5 | 733 views | 0

What I want to do I'd like to propose a couple changes to the optical slit based on observations...

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spectrometer kits slit sensitivity



Oil testing spectrometry workshop at Fab 10

by warren | 4 months ago | 5 | 912 views | 1

I ran a small session on developing the oil test kit spectrometer yesterday in Barcelona (http://...

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spectrometer workshop fluorescence response:8973


Presentation at FAB10 in Barcelona

by warren | 4 months ago | 1 | 286 views | 0

I'm presenting today at FAB10 (http://fab10.org) and wanted to share my presentation! https://do...

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barcelona spain presentation fab10


Reimagining the data lifecycle

by warren | 4 months ago | 0 | 306 views | 0

This article, by Jeffrey Warren and Shannon Dosemagen was first published in the summer of 2011 i...

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gmf grassrootsmappingforum forum with:shannon


Idea for<$5 analog thermal fishing bob

by warren | 5 months ago | 1 | 453 views | 3

Using 555 timers and no Arduino... Only red/blue LEDs!

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water-quality thermal-fishing-bob thermal open-water



Public Lab community newsletter 5.23.14

by warren | 5 months ago | 0 | 493 views | 0

Hello folks - the Northeast Barnraising is quickly approaching, and research discussions on our m...

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Viewing mica through a polarizer

by warren | 6 months ago | 1 | 393 views | 0

Mathew Lippincott has been collecting and posting research on low-cost approaches to silica detec...

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dust smartphone silica particulate


Public Lab Community Newsletter 5.4.14

by warren | 6 months ago | 0 | 412 views | 0

Featured image: an Infragram-converted Mobius Action Cam false-color image, by Mathew Lippincott ...

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Public Lab trading cards

by warren | 7 months ago | 1 | 760 views | 5

For highlighting awesome enviro monitoring and other stories. Collect them all!

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organizers case-studies trading-cards



$0.75 lead testing color strips

by warren | 7 months ago | 4 | 610 views | 2

Ok -- how does this work and can we DIY this?

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soil kit lead strip


Infragram featured in April's issue of Wired

by warren | 7 months ago | 1 | 871 views | 3

Just got this at the newsstand -- pretty neat, if brief! Woohoo!

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media infragram wired