What if, during a culling of points, you get the message that some cameras have insufficient whatever and will be reset? What does that imply? Is there a procedure for that scenario?
In that case the gradual selection has removed all the tie points on that photo have been deleted and it can no longer be aligned to other photos. Usually this is not a big deal if you have sufficient overlap and that the photos lost are not all clumped together (in which case you will be left with a hole in your model). This implies that the photo that was lost had minimal tie points and the ones it did were very noisy. Probably not a big loss. Losing a photo here or there isn’t usually a big deal.
@@lightninggis4758 Thank you for clarifying (and responding quickly!). One other question I had was your gradual selection order of the last two operations - I've seen those two flipped on the Geospatial Tips channel here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-je79gV8HsZI.html Do you have a rationale for one or the other?
hi, May i what is the other way to identify the unit value of Elevation or the Vertical Coordinate System? because my raster doesn't have data in the properties source
Great Video. It would be great if you can make more videos on Agisoft Metashape. Can you let us know how to remove distortion in Orthomosaic. Even following all the steps I have got distortion in building edges, if you can post a video on the same would be great.
Thank you, excellent video. This is just what I was looking for. I'm going start using this technique as another check on my rover RTK fixes as I'm working under challenging conditions.
How did you come up with those numbers of level thersholds of each of the gradual selection methods? Is there some kind of documentation on this? I wasn't able to find it anywhere else. Thanks for this very useful video!
Because you may break up the whole process by deleting too many points. Agisoft uses those points to the later on build a dense cloud if you delete too many agisoft might not be able to create a dense cloud
This was a great tutorial. Thank you. After I confirm the first 2 GCP, I get an “infinite values in transform not allowed” Transform works fine for the the first 2 (regardless of which I start with) and generates this error message on the third GCP every time. Any suggestions?
Apologies if this is covered in the video, I can't find it, but what was the accuracy of the original and corrected points? Presumably the corrected points were more accurate but still slightly inaccurate
@@enad7160It's been 8 months so I'm not quite sure but I don't think I was asking about the accuracy of the corrected Vs original, rather the corrected Vs actual
This is by far the most useful advanced vídeo I found. Thanks so much. Really appreciate the effort on bringing this material to us. Best regards from Bolivia
Hi, Great video. I am very new to metashape, so am trying to learn it. Could you explain why all the cameras are deselected before you run the reprojection filter? Doesn't doing the reprojection adjust camera locations? If the cameras are turned off what is changed? I watched another of your videos on the other two gradual filter options (Reconstruction uncertainy and projection accuracy) and you have all cameras selected for running those filters. Any help appreciated.
Wow man, just wow. you're hands down the best i've found on these metashape steps. i really hope people tell you what an amazing teacher you are, thank you so much for taking the time to actually help us beginners out...for free! i really hope you see this comment so that you know how much you're appreciated.
hey... please help me on that. Can i have multiple base stations in RTKlib to increase the accuracy of rover lat lon. i want RTKlib to have five base stations and one rover
To my knowledge RTKlib can’t do that. Do you mean multiple GPS receivers as base stations or using multiple CORS stations? If you have a short baseline (distance between your base and rover; 10 km for RS+ or 60 for RS2) I don’t see how using multiple base stations would provide you an advantage.
If you have a cell phone and app that can export RAW data it should be theoretically possible. However, I’m not aware of any cellphone that has the quality of GNSS chips necessary to capture the data.
@@lightninggis4758 thanks for the answer. I will receive a nord 100 smarthphone that has L1, L5, E1 E5, BD, etc. I will try to do the process after 1h of observation.
I've been following this tutorial to the "T" and having problems with the excel spreadsheet. When I copy the data from my "sheet 1" and paste it in, the Point_Results worksheet still has mostly value errors (#VALUE!). This is the step I cannot get past and I'm not sure what is wrong with the formula. I'm using data from an Emlid RS2. Thanks in advance for any advice.
Right click and choose paste values only or after you paste there should be a little pop up that you can choose values only, or also there is a button named paste values only. That is happening because it is trying to paste the formulas that have external references in them, when all you actually want is the output of those formulas.
I love how youtube shows me videos that I would never find out on my own. Man, I just started over one of my projects based on your class. Thanks for the videos!! Cheers from Brazil.
Thank you for this very informative video. I've been searching all over for a detailed video like this. I'm looking to do set up control points for UAV flights with a single Reach RS unit. Once I get going, I plan to get a second receiver to set up my own base.
Hello, can you briefly explain why only optimizing with f, k1-k3, cx,cy, p1, p2 for Reconstruction Uncertainty and Projection Accuracy? Then later on after adding markers (or not … if ppk reference positions), when you optimize to all parameters - any reason not to also do 'fit additional corrections'? What is the additional corrections anyways, do you know? During alignment, is it appropriate to select adaptive camera model fitting? Even though after will be doing filtering and optimization the way you show. i am just trying to get some sense of WHY for these steps you mention.
My workflow has evolved a little since I produced this video (in part due to further experience and experimentation and in part due to updates to the software). I now use “adaptive camera model fitting” and “fit additional corrections” and I don’t bother with the individual check boxes. I can’t explain the different individual parameters (at least off the top of my head 😃) but there are articles and websites that do and are easy to find.
Hi! Thank you so much for this wonderful and very useful tutorial! Just one hint on Excel: You can import files (POS or others) with powerquery (and save the pquery import definitions). That way, Excel will import and transform/format the table as you usually do, automatically (just hitting refresh button). It will be particularly useful for larger datasets, where clipboard or excel might be struggle with the data.
Toby that video is just what the doctor ordered. Being new to Emlid Rov & Base, this really covered it where many videos fall short at the end steps. Thanks heaps. Troy
