measurement
measurement


Author Comment Last activity Moderation
seankmcginnis "This is an interesting model from the International Hydrographic Organization (IHO) for collecting bathymetry data. They have established standards..." | Read more » over 1 year ago
peralatanlab "Great discussion! " | Read more » over 1 year ago
jjcreedon "Yes, I might add that our soil sampling toolkit and instructions were developed to meet EPA procedures and protocols. " | Read more » over 1 year ago
Ag8n "While inexpensive tests will always be the need ( as in test strips) the group should transition to more sophisticated tests, as possible. This wo..." | Read more » over 1 year ago
Ag8n "A mess up on my part. "How trace depends on the grade of DEHP they bought" should read "How trace depends on the grade of TOTM they bought.". My bad " | Read more » over 1 year ago
Ag8n "On your note on phthalates- a question. Were you talking about bis 2ethyl,hexyl phthalate (DEHP) or bis n-octylphthalate (DnOP)? A lot of medica..." | Read more » over 1 year ago
bhamster "Thanks for outlining these additional considerations @fongvania! For context, this question came from a community member during a public event for..." | Read more » over 1 year ago
liz "Hi @fongvania, what an important and enormous question you've opened here! Could you put a finer point on it? Otherwise, we could write a book for ..." | Read more » over 1 year ago
mathew "@DavidMack Good catch! My notebook measures test 2 at 38.78, right next to 39.78 for the next test! I edited the note. thanks! You're right abou..." | Read more » over 7 years ago
DavidMack "@mathew Great work and the title is appropriate! Sometimes when I’d compare instruments head to head it would be referred to a “shoot out”—an inst..." | Read more » over 7 years ago
warren "Yeah Dan, I later realized that a draw valve at the top would be better than a push valve at the bottom, and I think it'd mean the gasket would be ..." | Read more » over 7 years ago
danbeavers "@warren How do you start the timer? I don't see a sensor for the start, only the end. Another set of electrodes appear necessary. Will that set ..." | Read more » over 7 years ago
warren "Wow, very cool. I'm thinking of what kinds of vessels could be easily adapted to a DIY version of the sort of spring-loaded bubble making frame in ..." | Read more » over 7 years ago
WhiteRabbit "Great post. It's also worth mentioning how temperature might affect water conductivity measurements: see comment under http://publiclab.org/notes..." | Read more » over 8 years ago
neilh20 "Hey Donblair - you've got some great posts. The above was from my experience - working with designing a simple water level measurement device. Real..." | Read more » over 8 years ago
donblair "Thanks, Neil -- this will be a great document to reference, going forward! The water depth measurement, and use of ruler as a an accessible standa..." | Read more » over 8 years ago
patcoyle "Jenny, sorry if my note isn't clear. I used Meshmixer to “close” the bottom of the earth mound feature. The screenshots and captions illustrate the..." | Read more » over 8 years ago
jenny "I have been trying to figure out a way of measuring the volume of an "open" model that I generated in Meshlab so reading this post was very helpful..." | Read more » over 8 years ago
patcoyle "Thanks meshmixer, this is a technique we would like to use in cases where automatic volume calculations are useful. So we'd very much like to learn..." | Read more » almost 9 years ago
meshmixer "You can also measure volume in meshmixer - run the 'Stability' tool under the Analysis tab, and the volume and surface area will be shown in a pop-..." | Read more » almost 9 years ago
mathew "Pat, I think the pointcloud will have to be closed into maniform mesh, and then possibly constructed into a solid. Here is a tutorial on using mes..." | Read more » almost 9 years ago
fnok "Sounds like a great application for NIR imagery. I think you may even benefit by putting your camera back up in the air --> balloon mapping or a..." | Read more » about 9 years ago
warren "There's been some discussion of blurry images and how to fix this to some degree in the mailing lists: https://groups.google.com/forum/#!searchin/p..." | Read more » about 9 years ago
drkatnz "Sure, have provided a zip file link with all the source, and posted some pictures into the article itself. Not sure why the focus sucked on the di..." | Read more » about 9 years ago