GAProctor

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GAProctor last won the day on September 10 2019

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About GAProctor

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  1. GAProctor started following Aerotas and Carlson Software and DJI M600 Pro RTK
  2. GAProctor
    It is described as RTK, but I don't see the RTK unit(s) anywhere in the photos?
  3. GAProctor
    There are now many powerful, lower cost LiDAR sensors available. The issue is putting them to use. It is no easy matter to effectively mount a sensor to a drone and sync it with an INS or IMU to get any kind of usable output. There are other issues as well such as number of returns, FOV and signal strength to consider. The good news is the good sensors are coming way down in price and that will benefit the drone mapping community eventually. What we need now is for the price of survey grade IMU's and INS components like the applanix to come down in cost.
  4. GAProctor
    Chuck, What do you mean by "really liked the developers"? I used Zephyr a couple of years ago. It was OK, though I did like it's ability to take frames from video, but I know they have been upgrading things pretty consistently.
  5. GAProctor
    What Do you mean by "Map Out"? Most generic cad programs have issues with large point clouds and so you need to find a program that is particularly designed to handle them. There are many of these and they each have differing capabilities. So part of the answer will depend on what you want to do with the point cloud. If you are modeling pipes and small detailed infrastructure, you want one that specializes in that. If what you want is to be able to run contours and do some simple structure outlines, then there are many that can handle this. What kinds of features are you trying to e
  6. GAProctor
    Does anyone have any experience with using a Hyperspectral or Multispectral camera with a P4P (or other UAV) for mapping SAVs? How about lake/freshwater plants in general for use by a biologist to identify species and map locations? Or just ideas or notes in general?
  7. GAProctor
    First, I would say that time will tell with the P4-RTK. Let's see how it works in the real world and how various mapping scenarios effect it's performance. It is an advancement for the P4P in that DJI has provided a built in solution to the problem of timing the GPS data precisely to the picture. Most cameras have a hot shoe for the flash attachment that can be used to time the data, but no such thing is on the P4P, and that timing is critical and is also the focus of 3rd party RTK adapters for the P4P. The new P4-RTK does not change any of the previously noted differences between RTK and
  8. GAProctor
    I was not aware that Aerotas did processing? What do they charge? how many photos? What kind of reports and deliverables? Can you do Nadir and Oblique in the same run? To me, that last is critical. Do yourself a favor and get a trial of P3dT and try it out. We are total Carlson, but even they told me probably not for what I wanted. I do have Carlson Point Cloud on top of Survey. I also do scanning and so use that for registering different clouds, but mainly so I can draft on the cloud and send it straight into my drawing. In the end, I went with Pix4D desktop. I will just go monthly ($350
  9. GAProctor
    Great answer by Av8Chuck. My thoughts were pretty much the same in that it really depends on the size of the project and the desired accuracy. The Z axis is always the hardest to get consistent, repeatable measurements of, so knowing all the inherent limitations is very important. The thing with the GCP(s) is that it is more than an anchor for the Z measurement. They also are crucial in ensuring that warping of the image it kept to a minimum. So to me it seems like you will definitely need more than just the one GCP or you won't really be able to compare flight to flight.
  10. GAProctor started following UAV to survey disused rail line
  11. GAProctor
    Thanks Dave, I have to get more into both those apps as they are not as straight forward as some others and I didn't see right off where to do some of that. I see with DD that you have to add apps. I'm very happy to have more oblique options!
  12. GAProctor
    What are you using for your capture platform? IOS or Android? I have not had a problem using P4D capture on my IPad (though the other day it refused to upload the mission with my DJI P4P). I have several capture apps installed. Maps Made Easy, Drone Deploy, DatuflyPro and DJI GS Pro. Many people really like Litchi which I am going to try out soon. My main gripe about most of them is you cannot control the gimble. P4DCapture and for the some applications, GS Pro allow this (as I am told Litchi does as well), and only P4D has crosshatch grids which are nice for getting better detail.
  13. GAProctor
    Kind of off topic, but have you used P4D and Photoscan Pro (PSP) much so far for other projects? I have an older version of PSP and it has issues because it uses International foot instead of US Survey foot. I thought I had a fix for that, but my clouds keep coming in in off a few feet and have to be registered. It's easy to see, I just import the control points back into the dense point cloud and see if the match the GCP's. This happens even though I state the projection as NAD83 US WASouth survey foot. I hope that is fixed, because I do really like how well the clouds turn out. I
  14. GAProctor
    Kermange, I'd have to wrap my head around this for a bit, but initially it seems like it should be somewhat straightforward. The "pit" as it were, is simply an upside down pile, so processing it should be no different than doing standard pile volumes. Maybe the software is having a problem with the "negative" direction, much like some older surveying software I had would go sideways if the coordinate values were negative. Gary
  15. GAProctor
    The problem here is that it seems you may have things a bit backwards. Also, without knowing how you controlled both data sets, it is almost impossible to give you a reliable answer. The first step should have been to ensure both sets of data are on the same system. You would need known points in both sets in order to do this. Using GPS derived points makes this easier, but for volumes it would not be necessary. GCP's are relatively easy to use in Photoscan Pro, but you need to know where they are, at least in relationship with each other, to be of any use. It may be easier to use the d
  16. GAProctor started following 3D / GIS / Land Surveying / Mapping
  17. GAProctor
    There may be others, but I no Datumate says their flight planner can do this. I have not used it but I believe they have a video that goes through the process. If you figure something out, please let me know.
  18. GAProctor
    I agree with @R Martin, but would add Photoscan Pro as an option as I personally liked the software better than Pix4D and actually think it has a much easier learning curve.