cfastie 299 research notes and 550 wiki edits | Admin

The ecology and history of forests and landscapes, and new ways to see these things. High-resolution stitched images of vegetation, including low elevation aerial photography and multispectral imaging. Design and distribution of 3D printed aerial photography rigs and microcontroller gadgets via the KAPtery. Tweeting these things.

My posts on these topics:


4 questions asked

110 answers posted

75 activities posted

1 activities attempted


Joined about 6 years ago


RV SensorShip V

by cfastie 3 months ago | 5 | 686 | 5


What would you do with SensorShip?

by cfastie 3 months ago | 1 | 216 | 3


Extra Super Volatile

by cfastie 4 months ago | 2 | 188 | 4


Nano particle monitoring

by cfastie 5 months ago | 7 | 590 | 7


Logging firewood

by cfastie 6 months ago | 0 | 145 | 2


Fun with u-blox

by cfastie 7 months ago | 0 | 103 | 1



DFRobot TDS sensor first look

by cfastie 9 months ago | 2 | 549 | 1


Installing the water-level monitor

by cfastie about 1 year ago | 0 | 316 | 5


Assembling a Mini Pearl Pro Logger

by cfastie about 1 year ago | 0 | 301 | 2


Mounting and deploying a Mini Pearl Logger

by cfastie about 1 year ago | 1 | 211 | 2


Low-power timer upgrade

by cfastie about 1 year ago | 0 | 467 | 2


Real time and temperature

by cfastie about 1 year ago | 6 | 909 | 2


How to make a low power timer

by cfastie about 1 year ago | 1 | 451 | 2


A DIY low power timer

by cfastie about 1 year ago | 1 | 917 | 1


New data loggers for long-term logging

by cfastie about 1 year ago | 0 | 382 | 2



Public Lab's Big Red Christmas Balls

by cfastie over 1 year ago | 1 | 153 | 0



Memory of Feathers

by cfastie over 1 year ago | 1 | 206 | 1


Longer Mini Pearl logging

by cfastie over 1 year ago | 1 | 343 | 1


Will an Arduino measure water depth?

by cfastie over 1 year ago | 0 | 1,631 | 1


Putting sensor data to work

by cfastie over 1 year ago | 1 | 353 | 1


Yule logging

by cfastie over 1 year ago | 9 | 488 | 3


Choose a camera for aerial photography

by liz about 2 years ago | 2 | 240 | 1

Image from [Ebay seller Goodwill Maine](http://www.ebay.com/usr/goodwill-maine?trksid=p2047675....

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What goes into choosing a topic name?

by liz over 2 years ago | 2 | 496 | 3

_above: sketch of figuring out how to organize "air" into a research area, and which methods are ...

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I am getting very low NDVI values.

Accepted

Anice asked about 3 months ago

Answers

DIY conductivity Sensors

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roberts_ecofarm asked about 6 months ago

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NDVI Numerical Values

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AgtechMan asked about 7 months ago

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answered on Sep 28, 2018 0

answered on Sep 28, 2018 0

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What are ways to monitor algae blooms?

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stevie asked about 8 months ago

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answered on Aug 15, 2018 0

answered on Aug 14, 2018 1

answered on Aug 14, 2018 1

answered on Feb 15, 2019 1

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Best low cost camera for indoor plants?

DrC asked about 8 months ago

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How to design scientific experiments?

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niklasjordan asked about 11 months ago

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Calculating NDVI - using PiNoIR camera and blue filter

JLJ asked about about 1 year ago

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answered on Apr 09, 2018 0

answered on Apr 10, 2018 0

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Why do the plant colors look the way they do?

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jenhu asked about about 1 year ago

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Spectral Range of Lens?

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RexToother asked about about 1 year ago

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what data-logger will work with my portable HCHO meter?

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nshapiro asked about about 1 year ago

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answered on Mar 28, 2018 1

answered on Apr 10, 2018 1

answered on Apr 11, 2018 1

answered on Apr 11, 2018 1

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Quantitative analysis of wood moisture

MarcioPamplona asked about about 1 year ago

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answered on Mar 18, 2018 2

answered on Mar 18, 2018 2

answered on Mar 18, 2018 2

answered on Mar 19, 2018 3

answered on Mar 19, 2018 0

answered on Mar 19, 2018 0

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600 year old cedar tree - Infragram

Randall asked about about 1 year ago

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Modified TDS sensor as Conductivity Sensor?

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MadTinker asked about about 1 year ago

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answered on Mar 10, 2018 1

answered on Mar 11, 2018 0

answered on Mar 20, 2018 1

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View these maps at MapKnitter.org »

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Comments

Comment Last activity Moderation
"The standard (last generation) Arduinos are circuit boards with the ATmega 328p microcontroller chip on them. A common hacker exercise eight years ..." | Read more » 10 days ago
" More clarification on the display: For a battery powered logger, you could use an e-paper (e-ink) display which retains the image after it has bee..." | Read more » 10 days ago
"I'm glad this might help. One clarification to my comment above: Adding a display to the logger works best if the logger is plugged into the wall (..." | Read more » 10 days ago
"It is quite easy to build the environmental data logger you describe for $15. All of the parts for a Mini Pearl Logger can be ordered from eBay for..." | Read more » 11 days ago
"Hi jeffalk, Thanks for pointing out that the PM10 index includes all particles smaller than 10µm. If that is true, you are correct that PM10 shoul..." | Read more » 15 days ago
"If a device based on a Plantower sensor includes hardware that allows either live numerical display or data logging, it can be a very useful tool. ..." | Read more » 18 days ago
" Writing data to eeprom will work with the limitations you outline. Adding a microSD card module and 128 MB SD card costs less than $2.00. Adding..." | Read more » 18 days ago
"Thanks, I have pinged the editor. The views on this research note have doubled since December. I wonder what they would be if the link had been co..." | Read more » 22 days ago
" I just noticed that Limor Fried wrote an article for Make Magazine in January citing this research note and using one of the images. An editor ask..." | Read more » 23 days ago
"A full spectrum camera is one that has been converted to capture NIR by removing the IR cut filter. This filter which is present in all standard ca..." | Read more » about 1 month ago
"I don' t know what a "dedicated IR camera" is. You can use an appropriate red filter on a full spectrum camera to capture mostly NIR in the blue ch..." | Read more » about 1 month ago
" A red filter used to convert a full spectrum camera (IR cut filter removed) to an NDVI camera must pass red light and NIR light but no blue light...." | Read more » about 1 month ago
"Subtracting the blue channel from the red channel is a good first step for correcting for contamination of the red channel with NIR. With one parti..." | Read more » about 2 months ago
" One photo every 50 shots might be sufficient. It depends on how much the light changes during that time (5 minutes?, an hour?, a day?). You might ..." | Read more » 2 months ago
" You are correct that your multi-day observation will present some problems. It is possible that doing a custom white balance on each day will comp..." | Read more » 2 months ago
"These are really nice bee images. If your goal is to make a seamless composite, the free Microsoft ICE (Windows only) will stitch the photos into a..." | Read more » 2 months ago
"The primary advantage of dual band filters is that they pass much narrower bands of wavelengths than red or blue filters (which also pass NIR). Th..." | Read more » 3 months ago
" The simplest modification to make the sketch save to SD card once per minute is to change the line: if (logData == 1) // wr..." | Read more » 3 months ago
"A few different cameras were used to take those photos. Most of the cameras were Canon PowerShots. I think all of the photos were saved by the came..." | Read more » 3 months ago
"Performing a custom white balance on a blue-filtered NIR camera fools the camera into exaggerating the brightness of the red channel. The red chann..." | Read more » 3 months ago
"It will always be difficult to know for sure to what degree the red channel is contaminated by NIR. It might be worthwhile making an estimate. For ..." | Read more » 3 months ago
"Although the absolute values you computed for NDVI are lower than they should be, it appears that your process is successfully discriminating betwe..." | Read more » 3 months ago
"Liz, it's great to know that you (or I guess your Mom) were well coiffed in the 80s, although I regret that you did not include photographic eviden..." | Read more » 4 months ago
"You are correct that both red and NIR pass through the red filter (Rosco Fire # 19) and both are captured in the red channel of the photograph. It ..." | Read more » 4 months ago






























cfastie was awarded the Basic Barnstar by warren for their work published in Superblue.


cfastie was awarded the Basic Barnstar by warren for their work published in Graze anatomy.


cfastie was awarded the Basic Barnstar by liz for their work published in Holiday Beverage Whodunit.


cfastie was awarded the Basic Barnstar by stevie for their work published in Nano particle monitoring.


cfastie was awarded the Basic Barnstar by Elidacanup for their work published in Broadening.


cfastie was awarded the Basic Barnstar by david-days for their work published in Compost is hot, says Riffle.


cfastie was awarded the Basic Barnstar by academicfora for their work published in A standalone aerial sensor pod.


cfastie was awarded the Empiricism Barnstar by warren for their work published in Grating angle.


cfastie was awarded the Empiricism Barnstar by xose for their work published in Real time and temperature.


cfastie was awarded the Photo Documentation Barnstar by warren for their work published in A DIY low power timer.


cfastie was awarded the Photo Documentation Barnstar by Hudonnoodles for their work published in Spherical KAP over Cocodrie.


cfastie was awarded the Photo Documentation Barnstar by stevie for their work published in NE Organizers Summit.


cfastie was awarded the Photo Documentation Barnstar by stevie for their work published in LEAFFEST 2014 accounting.


cfastie was awarded the Photo Documentation Barnstar by stevie for their work published in Public Lab Organizers Summit, 2014.


cfastie was awarded the Photo Documentation Barnstar by stevie for their work published in Putting sensor data to work.


cfastie was awarded the Photo Documentation Barnstar by todgobblins for their work published in Soaring Riffle.


cfastie was awarded the Video Documentation Barnstar by warren for their work published in SNOWFEST the Movie.


cfastie was awarded the Video Documentation Barnstar by mathew for their work published in Making the aluminum frame of an aerial camera rig (video).



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