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warren 7102 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 is Vice President of 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 Unterbahn.com.

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NDVI test in Lima Peru

by warren over 6 years ago | 2 | 2,740 | 0

We've been talking about NDVI imaging and i finally gave it a try, using Photoshop.

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Very clear spectrum through pineapple

by warren over 6 years ago | 6 | 2,085 | 0

We had a workshop at Escuelab in Lima, using DIY spectrometers last Friday/Saturday, and one grou...

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Plant spectral timelapse (~7hrs)

by warren over 6 years ago | 2 | 1,667 | 0


Can we use back-illuminated CMOS video cameras for UV imaging?

by warren over 6 years ago | 3 | 3,182 | 0

This image shows a back-illuminated CMOS sensor's wavelength sensitivity.

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Front-illumination CCDs (as used in digital cameras) don't perform well in UV

by warren over 6 years ago | 13 | 2,197 | 1

and this is why: http://books.google.com/books?id=dtYs6a2kME8C&lpg=PA10&ots=PnUOR1kcOE&dq=uv%2...

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UV photography & quartz lenses

by warren over 6 years ago | 6 | 1,718 | 0

http://www.naturfotograf.com/UV_IR_rev07.html0

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Using the HITRAN database for spectral analysis

by warren over 6 years ago | 5 | 8,359 | 0

I'm really curious about our ability to identify methane and other gases with DIY spectroscopy in...

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Methane absorption band at around 1100nm

by warren over 6 years ago | 0 | 3,565 | 0

Playing with the HITRAN online database: http://hitran.iao.ru/molecule/bands/mol/60

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Normalized Difference Vegetation Index, NRG, and Landsat 7 bands

by warren over 6 years ago | 0 | 7,564 | 0

OK, for reference, NDVI is often based on Landsat images. Landsat 7 (the current landsat) has the...

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Scanning spectrometry video test

by warren over 6 years ago | 0 | 1,680 | 0


Bayou St. Denis in Cartagen Knitter

by warren over 6 years ago | 0 | 1,885 | 0

http://cartagen.org/maps/bayou-st--denis Pitch in sorting on http://MapMill.org!0

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Toy spectrometers arrived

by warren over 6 years ago | 0 | 3,161 | 0

They're great in helping us refine our DIY spectrometer design. See a spectrum I created with one...

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How To Make Time Lapse Spectrometer

LightWaveResearch8000 asked about about 1 month ago

Answers by warren

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

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warren asked about about 1 month ago

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Desktop Spectrometry Kit to arduino?

jjoll asked about about 1 month ago

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

marlokeno asked about about 1 month ago

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Can anyone help with weather station recommendations?

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stevie asked about 2 months ago

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Cheap, lightweight GoPro alternatives for aerial mapping?

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warren asked about 3 months ago

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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 3 months ago

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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?

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stevie asked about 3 months ago

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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 4 months ago

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Is this government security warning on NOAA new?

marlokeno asked about 5 months ago

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Good guides on doing a photo survey of a site?

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warren asked about 5 months ago

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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 6 months ago

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what causes spectral colors to be reversed?

vgoebel asked about 7 months ago

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Fraunhofer Lines at higher resolutions?

stef asked about 7 months ago

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How to get spectral data in excel or other formats

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suha asked about 7 months ago

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Can you process multiple images at the same time?

JonathanM32 asked about 7 months ago

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orientation of slit vs that of diffraction grating

wlkwong asked about 8 months ago

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Video Infragram

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jfd asked about 8 months ago

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Ambient/Light Bulb Testing

idev247 asked about 8 months ago

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

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warren asked about 9 months ago

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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?

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dhale2 asked about 9 months ago

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Calibration of spectra fails

Paul_P asked about 9 months ago

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Why copy calibration does not apply?

aelobo asked about 9 months ago

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Intensity for spectra too low?

chuynh451 asked about 10 months ago

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Is there an iPhone app for foldable spectrometer?

CanfieldC asked about 10 months ago

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Can you share a link to project documentation?

vwls asked about 10 months ago

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Error on calibrating uploaded spectrum

sarahcm asked about 10 months ago

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Can anyone help me troubleshoot my NDVI imagery?

abdul asked about 10 months ago

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lightweight air quality sensors for a weather balloon

glenc asked about 10 months ago

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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 10 months ago

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

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warren asked about 11 months ago

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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 11 months ago

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answered on Sep 16, 2016 0

answered on Dec 08, 2016 0

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

Accepted

nshapiro asked about 12 months ago

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Does the new Question feature work?

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warren asked about about 1 year ago

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Question: Using a webcam with a image resolution of 1920x1020

seko asked about about 1 year ago

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Question: How to rename a set?

AndrewJamesLaplante asked about about 1 year ago

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Question: How do I get the calibration user interface?

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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