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The creator of 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 board of alternative education program Parts and Crafts in Somerville MA, 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 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


Standardizing open source hardware publication practices with contributors.json

by warren | 7 days ago | 11 | 209 views | 0

Alicia Gibb of OSHWA and I (I'm on their board) cooked up the idea, chatting a few months ago, of...

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open-hardware attribution contributing oshwa

Tutorial video: Installing MapKnitter 2

by warren | 12 days ago | 0 | 212 views | 1

To learn to install MapKnitter yourself, check out this video I just made: Enjoy! 12 minutes,...

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video mapknitter software developers

Announcing MapKnitter 2.0

by warren | 18 days ago | 1 | 1,369 views | 3

Hello, mapmakers! The Web Working Group has just launched the final version of MapKnitter 2, int...

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balloon-mapping kite-mapping grassrootsmapping mapknitter

MapKnitter 2: Test Edition

by warren | 21 days ago | 0 | 583 views | 1

Hello, mapmakers! The Web Working Group has set up a testing version of MapKnitter 2, integratin...

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balloon-mapping mapknitter web-development webworkinggroup

Planning for Spectral Workbench 2.0

by warren | 21 days ago | 17 | 522 views | 3

Hello Spectral Workbench community! Do you wish you could do more with Spectral Workbench? Do y...

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spectrometer spectral-workbench oil-testing-kit

2015 Web Working Group report

by warren | about 1 month ago | 0 | 321 views | 1

Overview This quarter, we moved all major services into Rackspace hosting, taking full advantage...

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website web-development web developers

Dreaming of sensitive friends

by warren | 3 months ago | 1 | 485 views | 5

I took these portraits in a session at the open water workshop at Propeller, in New Orleans, toni...

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gulf-coast workshop sensing water-quality

Table for choosing monitoring tools

by warren | 4 months ago | 0 | 403 views | 2

What I want to do I spoke with Carl from the EPA at the Engadget Expand conference last Saturday...

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epa development comparison sensitivity

CFL detection by contrast, for auto-calibration

by warren | 4 months ago | 0 | 746 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 | 4 months ago | 1 | 1,879 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 | 5 months ago | 1 | 562 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 | 5 months ago | 2 | 970 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 | 5 months ago | 2 | 1,235 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 | 6 months ago | 6 | 617 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 | 6 months ago | 3 | 623 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 | 6 months ago | 7 | 527 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 | 6 months ago | 1 | 665 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 | 7 months ago | 1 | 1,843 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 | 7 months ago | 4 | 764 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 | 7 months ago | 12 | 833 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 | 7 months ago | 7 | 592 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 | 7 months ago | 13 | 1,447 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 | 7 months ago | 1 | 616 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 | 7 months ago | 9 | 756 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 | 7 months ago | 0 | 540 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

by warren | 8 months ago | 0 | 552 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 | 8 months ago | 12 | 1,112 views | 0

I held two workshops at Fab 10 ( where we launched an Infragram Point & Shoo...

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near-infrared-camera kite-mapping barcelona spain

Spectrometer slit width thoughts

by warren | 8 months ago | 5 | 1,068 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 | 8 months ago | 5 | 1,241 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 | 8 months ago | 1 | 431 views | 0

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

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barcelona spain presentation fab10