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warren 7883 research notes and wiki edits | Admin

The creator of GrassrootsMapping.org and co-founder and Research Director for Public Lab, 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 served from 2015-17 as Vice President of the board of the Open Source Hardware Association, is on the board 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.


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84 questions asked

175 answers posted

2608 comments posted



Split bifocal filter design for near-infrared + visible pjotography

by warren over 6 years ago | 0 | 1,609 | 0

With only one camera

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NYTimes: Chemicals in Farm Runoff Rattle States on the Mississippi

by warren over 6 years ago | 0 | 1,086 | 2

<span class="Apple-style-span" style="font-family: georgia, 'times new roman', times, ser...

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DevelopmentSeed post on WhereCamp 2011

by warren over 6 years ago | 0 | 944 | 2

With a great photo of Stewart filling up a balloon -- this is just before it popped, I think....

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Grassroots Mapping awarded Honorary Mention at Prix Ars Electronica

by warren over 6 years ago | 0 | 1,535 | 2

The Grassroots Mapping project was recently awarded an Honorary Mention at the 2011 Prix Ars Elec...

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Is blue data read first?

by warren over 6 years ago | 0 | 1,159 | 2

Check out the color smear on those reflections in this balloon image from Wilkinson Bay, Louisiana.

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Comparison of 4 versions of imagery, moire effects and resampling

by warren over 6 years ago | 0 | 1,614 | 2

Check out this image of Wilkinson Bay, Louisiana, by the USGS. Clockwise from top left: Geot...

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DIY vacuum deposition for making mirrors

by warren over 6 years ago | 0 | 5,167 | 2

Wow, this guy has made his own mirrors by evaporating metal in a vacuum chamber... you could make...

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Balloon Mapping iPad app

by warren over 6 years ago | 3 | 4,751 | 2

(above image by Gret Curtis, CC-BY) ...

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First surface mirrors can be found in old scanners

by warren over 6 years ago | 0 | 1,044 | 0

Could be relevant for DIY UV or infrared spectroscopy.

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Excerpts on using UV and IR for oil slick identification

by warren over 6 years ago | 0 | 3,067 | 0

Here's a great excerpt from "Remote Sensing: Principles and Interpretation" by Floyd Sabins -- an...

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Rent FLIR thermal infrared cameras at some Home Depots

by warren over 6 years ago | 2 | 8,593 | 0

I wonder how much it costs? I think I'll give them a call. Update, 2 years later: $75 p...

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Area calculation of Mestia, Georgia

by warren over 6 years ago | 0 | 2,175 | 0

Wow, this 2-day flight resulted in over 1700 acres of of coverage at an average resolution of 21....

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Calculating area of a map, the dumb way

by warren over 6 years ago | 0 | 1,572 | 0

This online tool, at http://gisapps.co.union.nc.us/community-mapper/, is designed for parcel meas...

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Sunbathers next to cleanup crews in Ocean Springs, Missisippi

by warren over 6 years ago | 0 | 1,274 | 2

This is a great excerpt from the Ocean Springs map, ma...

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Infrared visible dual camera mapping rig by Cesar Harada

by warren over 6 years ago | 0 | 1,233 | 2

It worked really well!

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Birds at Grand Isle State Park

by warren over 6 years ago | 0 | 1,262 | 2

Shannon Dosemagen, Adam Griffith, and I took this image yesterday (May 12, 2011) at Grand Isle St...

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USDA Farm Services Agency imagery of oil in Barataria Bay

by warren over 6 years ago | 1 | 1,198 | 2

Adam found some good USDA imagery of oil in Barataria Bay --we've got to track down this s...

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Testing new false color gradients for NDVI

by warren over 6 years ago | 0 | 2,591 | 0


Hoya UV filter profiles

by warren over 6 years ago | 1 | 1,824 | 2

Just a note for Alex and I -- some Hoya UV filters are much better than others at blocking infrar...

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Antipodes: a journal of radical geography

by warren over 6 years ago | 0 | 1,232 | 2

http://www.antipode-online.net/ Pretty i...

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Emails expose BP's attempts to control research into impact of Gulf oil spill

by warren over 6 years ago | 0 | 1,169 | 2

<a href="http://www.guardian.co.uk/environment/2011/apr/15/bp-control-sc...

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Draft revised spectrometer guide by Alex McCarthy

by warren over 6 years ago | 0 | 1,889 | 0

Alex has been working on a new guide, specifically for fluorescence spectroscopy of water samples...

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Video on geocoded conductivity readings from strip mine watersheds

by warren over 6 years ago | 0 | 1,260 | 2

via Chris Irwin on the Mountain Justice news list: <iframe width="480" height="390" src="https...

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Placematters.org launches balloon with iPhone attached

by warren over 6 years ago | 0 | 1,121 | 2

<...

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Balloon Mapping Harvard GSD

by warren over 6 years ago | 2 | 1,569 | 0

<iframe src="http://player.vimeo.com/video/22491115?title=0&byline=0&portrait=0" width="5...

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Cheap UV photos: Using a UV-pass filter with a CMOS camera

by warren over 6 years ago | 5 | 11,896 | 0

We're using a Hoya UV-pass filter which we bought from UQG Optics, but you can buy it [on Edmund ...

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BBC News - Google to amend Rio maps over Brazil favela complaints

by warren over 6 years ago | 0 | 2,169 | 1

http://www.bbc.co.uk/news/world-...

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Final day of infrared photography at Parts & Crafts

by warren over 6 years ago | 0 | 4,018 | 0

Today was the last of our 3 days doing "pole aerial photography" (coined by Nathan Craig?) with [...

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OnEarth magazine: Citizen Science : Radiation Monitoring meets Grassroots Mapping with RDTN.org

by warren over 6 years ago | 0 | 1,356 | 0

http://www.onearth.org/blog/citizen-radiation-monitoring-meets-grassroots-mapping

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How to connect to a Vivitar $10 Walgreens camera

by warren over 6 years ago | 0 | 3,616 | 0

from:http://www.camerahacker.com/Forums/DisplayComments.php?file=Digital%20Camera/Vivitar/Anyone_...

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What do I need to get started with the Community Kits program?

Accepted

warren asked about 6 days ago

Answers by warren

Where can microscope lenses (objectives) be bought?

warren asked about 6 days ago

Answers by warren

Noise when Trying to Analyze Spectrum

matthart610 asked about 9 days ago

Answers by warren

What are different commercially available hydrogen sulfide detection methods?

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warren asked about 9 days ago

Answers by warren

answered on Dec 04, 2017 0

answered on Dec 04, 2017 0

answered on Dec 04, 2017 0

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How to select a site for hydrogen sulfide testing?

warren asked about 15 days ago

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answered on Nov 28, 2017 0

answered on Dec 04, 2017 0

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How can we safely try out and evaluate a hydrogen sulfide test?

warren asked about 15 days ago

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answered on Nov 28, 2017 0

answered on Nov 28, 2017 0

answered on Dec 04, 2017 0

answered on Dec 04, 2017 0

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Training in odor identification?

Sara asked about 21 days ago

Answers by warren

Does the Beer Lambert law apply to the opacity of reagents?

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warren asked about 23 days ago

Answers by warren

answered on Nov 20, 2017 0

answered on Nov 20, 2017 0

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Best PLab demo ideas for a large group?

pdhixenbaugh asked about about 1 month ago

Answers by warren

Helium alternative

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mrw0116 asked about about 1 month ago

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How do I assemble the mini-balloon kit?

asnow asked about about 1 month ago

Answers by warren

What's happening at the 2017 Barnraising?

warren asked about about 1 month ago

Answers by warren

How do I easily set up a Raspberry Pi SD card?

warren asked about about 1 month ago

Answers by warren

What sessions would people like to have at the 2017 Barnraising?

warren asked about about 2 months ago

Answers by warren

answered on Oct 27, 2017 2

answered on Oct 27, 2017 1

answered on Oct 27, 2017 1

answered on Oct 30, 2017 1

answered on Oct 30, 2017 2

answered on Oct 31, 2017 1

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How do I access the wiki?

partsandcrafts asked about about 2 months ago

Answers by warren

How to connect a creative cam notebook with a smartphone?

KushalKC asked about about 2 months ago

Answers by warren

Need your feedback on Tag pages

tommystyles asked about about 2 months ago

Answers by warren

answered on Nov 15, 2017 1

answered on Nov 15, 2017 0

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How big is the filter in the infragram DIY filter pack?

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robotfarms asked about 2 months ago

Answers by warren


Has anyone used a RasPi camera in a DIY microscope?

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bmela asked about 2 months ago

Answers by warren

What are good sources of cheap bulk giant mylar balloons?

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warren asked about 2 months ago

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Is there an offline version of Mapknitter?

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stevie asked about 3 months ago

Answers by warren

How big are silica particles, in microns?

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warren asked about 3 months ago

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What should we do at LEAFFEST?

cfastie asked about 3 months ago

Answers by warren

answered on Sep 19, 2017 2

answered on Sep 19, 2017 1

answered on Sep 19, 2017 2

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How can I add credit for main photo on Wiki?

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Zengirl2 asked about 3 months ago

Answers by warren

What are some sources of new aerial imagery of Harvey damages?

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warren asked about 3 months ago

Answers by warren

answered on Sep 12, 2017 0

answered on Sep 13, 2017 0

answered on Sep 16, 2017 0

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How do I join a volunteer Disaster Response Team for flooding?

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warren asked about 3 months ago

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What is the best way to formalize connecting needs with offers?

bsugar asked about 3 months ago

Answers by warren

answered on Sep 08, 2017 0

answered on Sep 08, 2017 0

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How much do different oil pollution tests cost?

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warren asked about 3 months ago

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What does oil pollution mean for my health?

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warren asked about 3 months ago

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What could teenagers do to support Harvey response efforts?

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warren asked about 3 months ago

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How do I collect a sample for laboratory analysis?

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warren asked about 3 months ago

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Water Filter Effectiveness

Mempet asked about 3 months ago

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How big are smoke particles, in microns?

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warren asked about 4 months ago

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Calibaration or switching scale?

jayjay70 asked about 4 months ago

Answers by warren

Starlight Recorder KIC8462852

LightWaveResearch8000 asked about 5 months ago

Answers by warren

How To Make Time Lapse Spectrometer

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LightWaveResearch8000 asked about 5 months ago

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How do I install a bootloader on a Riffle data logger?

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warren asked about 5 months ago

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Assembly completed but the camera doesn't work.

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1987123 asked about 5 months ago

Answers by warren

Desktop Spectrometry Kit to arduino?

jjoll asked about 6 months ago

Answers by warren

How can we get rid of spam on the main PL page?

marlokeno asked about 6 months ago

Answers by warren

How do I cheaply do long-term outdoor timelapses?

warren asked about 6 months ago

Answers by warren

Can anyone help with weather station recommendations?

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stevie asked about 6 months ago

Answers by warren

Cheap, lightweight GoPro alternatives for aerial mapping?

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warren asked about 7 months ago

Answers by warren

answered on Jun 12, 2017 0

answered on Jun 14, 2017 0

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How can real-time camera monitoring be set up?

cherylh asked about 7 months ago

Answers by warren

answered on May 16, 2017 0

answered on Jun 19, 2017 0

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What are the health effects related to fine particles of calcium carbonate?

Accepted

stevie asked about 7 months ago

Answers by warren

answered on May 12, 2017 0

answered on May 12, 2017 1

answered on May 16, 2017 0

answered on May 22, 2017 1

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Decibel meters for iPhones?

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warren asked about 8 months ago

Answers by warren

Is this government security warning on NOAA new?

marlokeno asked about 9 months ago

Answers by warren

Good guides on doing a photo survey of a site?

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warren asked about 9 months ago

Answers by warren

answered on Mar 14, 2017 0

answered on Mar 14, 2017 0

answered on Apr 10, 2017 0

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JDEPC-OV05 camera intelligent exposure

tim_spec asked about 10 months ago

Answers by warren

DIY methods for nitrate detection in food?

fez asked about 11 months ago

Answers by warren

what causes spectral colors to be reversed?

vgoebel asked about 11 months ago

Answers by warren

Fraunhofer Lines at higher resolutions?

stef asked about 11 months ago

Answers by warren

How to get spectral data in excel or other formats

Accepted

suha asked about 11 months ago

Answers by warren

GoPro Hero HD first version- Making full spectrum( Removing IR filter)

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suman asked about 11 months ago

Answers by warren

Can you process multiple images at the same time?

JonathanM32 asked about 11 months ago

Answers by warren

orientation of slit vs that of diffraction grating

wlkwong asked about 12 months ago

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Video Infragram

Accepted

jfd asked about 12 months ago

Answers by warren

How to convert the csv or xml files to spectrum graph?

soheilkh asked about about 1 year ago

Answers by warren

How do you get the Crenova Game and Trail Hunting Camera into time-lapse mode?

Accepted

stevie asked about about 1 year ago

Answers by warren

answered on Dec 07, 2016 0

answered on Feb 03, 2017 0

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Ambient/Light Bulb Testing

idev247 asked about about 1 year ago

Answers by warren

How do I make a video from a series of photos?

Accepted

warren asked about about 1 year ago

Answers by warren

answered on Dec 05, 2016 0

answered on Dec 05, 2016 0

answered on Jul 23, 2017 0

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Spectral Workbench recording time?

Accepted

dhale2 asked about about 1 year ago

Answers by warren

Calibration of spectra fails

Paul_P asked about about 1 year ago

Answers by warren

Why copy calibration does not apply?

aelobo asked about about 1 year ago

Answers by warren

Intensity for spectra too low?

chuynh451 asked about about 1 year ago

Answers by warren

Is there an iPhone app for foldable spectrometer?

CanfieldC asked about about 1 year ago

Answers by warren

Can you share a link to project documentation?

vwls asked about about 1 year ago

Answers by warren

Error on calibrating uploaded spectrum

sarahcm asked about about 1 year ago

Answers by warren

Can anyone help me troubleshoot my NDVI imagery?

abdul asked about about 1 year ago

Answers by warren

How to process images using a mobius with an IR lens?

Accepted

miguel_rosas asked about about 1 year ago

Answers by warren

lightweight air quality sensors for a weather balloon

glenc asked about about 1 year ago

Answers by warren

answered on Oct 12, 2016 0

answered on Jun 19, 2017 0

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how to delete my spectra on Spectral Workbench

redleon asked about about 1 year ago

Answers by warren

Can I upgrade a DIY spectrometer with a Raspberry Pi camera?

warren asked about about 1 year ago

Answers by warren

How can I reduce ambient light inside the Desktop Spectrometry Starter Kit?

Accepted

warren asked about about 1 year ago

Answers by warren

answered on Sep 20, 2016 0

answered on Sep 20, 2016 0

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What's the best way to archive/store a timelapse video?

warren asked about about 1 year ago

Answers by warren

answered on Sep 16, 2016 0

answered on Dec 08, 2016 0

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Has anyone used a timelapse camera in stream monitoring?

stevie asked about over 1 year ago

Answers by warren

Question: What is the Open Source Community's Take the MIT License?

Accepted

nshapiro asked about over 1 year ago

Answers by warren

Does the new Question feature work?

Accepted

warren asked about over 1 year ago

Answers by warren

How to rename a set on Spectral Workbench?

Accepted

AndrewJamesLaplante asked about over 1 year ago

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Question: How do I get the calibration user interface?

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PeterDH asked about over 1 year ago

Answers by warren

View these maps <a href='//mapknitter.org/profile/warren'>at MapKnitter.org &raquo;</a>

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