| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| sujayj | "Thanks Chris " | Read more » | almost 8 years ago | |||
| warren | "These folks apparently did use timelapse cameras to track truck traffic: https://publiclab.org/notes/mathew/05-20-2014/frac-sand-frisbee-maps-again..." | Read more » | almost 8 years ago | |||
| cfastie | "You can use any filter that blocks most blue and green light (all visible light other than red) and also passes a lot of near infrared light (somew..." | Read more » | almost 8 years ago | |||
| liz | "Perhaps see related tutorial on estimating the height of waste piles (the flipside of the problem you are facing here): https://publiclab.org/notes..." | Read more » | almost 8 years ago | |||
| warren | "I really like the motion sensor truck counter approach. Do you think the motion sensing abilities of the Crenova trail camera will work for this? P..." | Read more » | almost 8 years ago | |||
| glennwalquist | "@cfastie @warren@tayreed@patcoyle Thanks for this incredibly valuable input as to the potential for measuring extracted volumes and stored pile..." | Read more » | almost 8 years ago | |||
| cfastie | "Structure from motion could be done with ground based photos, especially if the camera was on a tall pole. Multiple photos would be needed which in..." | Read more » | almost 8 years ago | |||
| warren | "Both @patcoyle and @cfastie have done a lot of this. Do you two know if this is at all possible? Thanks! " | Read more » | almost 8 years ago | |||
| 2x2l | "Here is an archive of the document you are looking for. (Hoping the file being down has nothing to do with the recent change of administration....)..." | Read more » | almost 8 years ago | |||
| stevie | "There is a great resource on Public Comment on this wiki. I have heard of groups who divide up the key points and have different people focus in o..." | Read more » | almost 8 years ago | |||
| liz | "Chris' answer is great. I was also going to write in about radish seeds specifically, and generally the need for warmth to signal seeds to sprout. ..." | Read more » | almost 8 years ago | |||
| pdhixenbaugh | "As an add-on, most stormwater flows into storm drains and directly into streams without treatment. In combined sewer systems, CSOs happen periodica..." | Read more » | almost 8 years ago | |||
| pdhixenbaugh | "Some other things -- certain types of industries can ask for an exemption from this permit if they claim they have zero stormwater pollution exposu..." | Read more » | almost 8 years ago | |||
| pdhixenbaugh | "The general permits also come in different variants, and the Municipal Separate Storm Sewer Systems (MS4) permit is a big one. For example, my muni..." | Read more » | almost 8 years ago | |||
| cfastie | "Try radish. They are easy to find as garden seeds this time of year. Other mustards are probably good too (cabbage, arugula, any mustard green). Bu..." | Read more » | almost 8 years ago | |||
| liz | "Many older cities treat stormwater before it is discharged. Quoting Kate Asher in Anatomy of a City (2005), "New York is one of only 800 or so citi..." | Read more » | almost 8 years ago | |||
| warren | "Just to clarify, #NPDES is the National Pollutant Discharge Elimination System " | Read more » | almost 8 years ago | |||
| stevie | "Yes! You can read about NPDES permit exemptions on this page "There are highly consequential exemptions listed in Section 402(l) of the Clean Wate..." | Read more » | almost 8 years ago | |||
| stevie | "You can read about this on the NPDES wiki here. "There are two kinds of permits issued under NPDES: individual and general. Individual permits are..." | Read more » | almost 8 years ago | |||
| stevie | "One way stormwater is regulated is through the National Pollutant Discharge Elimination System (NPDES). See NPDES wiki "NPDES only applies to “poi..." | Read more » | almost 8 years ago | |||
| warren | "Here are the quick-start instructions! Click to expand. " | Read more » | almost 8 years ago | |||
| warren | "Hi, just wondering about my question on the screw in the photo below -- is that to unscrew the lens assembly itself? " | Read more » | almost 8 years ago | |||
| Sigmund92 | "Thank you ! " | Read more » | almost 8 years ago | |||
| stef | "Any camera that has the IR cut filter removed. More specifically the one shipped with the PLAB spectrometer 3.0 stef " | Read more » | almost 8 years ago |