After watching far too many videos on Metashape, this is the best I've found. Thank you, Kelly, for an extremely detailed, nuanced and real-world overview. Much different from others that are more superficial and do not appear to have the same real-world hands-on experience that you possess.
Contents: 0:20 Configure the screen to "classic" 1:00 Add photos 1:25 Convert coordinates from WGS84 to a projected coordinate system 3:25 Import GCPs 3:30 Align Photos 5:20 Change navigation to "terrain mode" 7:00 Match GCPs 8:55 Update and optimize 10:10 Change units to US Foot 10:30 Filter photos by point - Big time saver!!! 12:00 Dense Cloud 13:30 View by Point Cloud Confidence 15:20 Manually Classify Ground Points 16:25 Build mesh with classified points 17:50 Export mesh 18:46 Thanks!
Nice Tutorial. I am a Texas RPLS with lots of Lidar & aerial mapping experience. Working on integrating Agisoft & UAV work flows and really appreciate your channel.
I am a surveying student at UMaine, and would really appreciate it if you posted the data so I could practice. Seriously thank you for posting the content that you do, I want to get into photogrammetry and LiDAR and it helps!
Thanks for making this helpful video! 9:20 in the Optimize Camera Alignment box what are all those options. When I got to that point several were pre-selected but I don't know what they mean or if I should keep them selected. Is it important to clean up the sparse cloud with the gradual selection tool? Would we do that before adding markers or after? Thanks!
Great video. I wonder why didn't you use automatic marker detection? I think i saw that in some of your videos. Where you do automatic marker detection, rename points and than import points with coordinates.
Thanks. I wanted to show the manual way to assign the GCPs in this video. Honestly, automatic detection rarely works on my projects, except for very low flights/large targets. Glad you liked the video.
Great videos I'm new to this how do you get it to take the grid of photos do you need a flight path then are u putting ground points out with a gps kit cheers. I'm guessing you need a really expensive drone to do this
with that big altitude errors between cameras and GCPs, should you uncheck cameras during optimization process? i was told since photoscan that they should be unchecked prior optimization, if non RTK drone is used, to avoid vertical incorrect reference information
Processing locally. I have a i7 desktop SSD drive, 32gb ram and a GTX1080. It works great, but I'm sure the newer stuff would be much faster! i9 RTX2080...
Any tips on classification of points? I see Metashape has an automatic classification option that would certainly help get down to bare ground if it works well. Thanks!
It's been my understanding that filter by confidence only displays the results of filtering but doesn't remove the low confidence points.. To remove the low confidence points we need to select and delete them before proceeding with the workflow. Now I need to do more research...
After watching far too many videos on Metashape, this is the best I've found. Thank you, Kelly, for an extremely detailed, nuanced and real-world overview. Much different from others that are more superficial and do not appear to have the same real-world hands-on experience that you possess.
glad you found value in the presentation! If you want to purchase, visit skysurv.us
Contents:
0:20 Configure the screen to "classic"
1:00 Add photos
1:25 Convert coordinates from WGS84 to a projected coordinate system
3:25 Import GCPs
3:30 Align Photos
5:20 Change navigation to "terrain mode"
7:00 Match GCPs
8:55 Update and optimize
10:10 Change units to US Foot
10:30 Filter photos by point - Big time saver!!!
12:00 Dense Cloud
13:30 View by Point Cloud Confidence
15:20 Manually Classify Ground Points
16:25 Build mesh with classified points
17:50 Export mesh
18:46 Thanks!
Nice Tutorial.
I am a Texas RPLS with lots of Lidar & aerial mapping experience.
Working on integrating Agisoft & UAV work flows and really appreciate your channel.
@@RayWeger No problem! Let me know if I can help in other ways. SkySurv.us
What are the obtimal values to be obtained in marker error and pixel error as a whole in the reference panel
I am a surveying student at UMaine, and would really appreciate it if you posted the data so I could practice. Seriously thank you for posting the content that you do, I want to get into photogrammetry and LiDAR and it helps!
Here you go! I will also add to the video description... drive.google.com/drive/folders/1pUvbJs-rGRalyYZocLSuEzOCv61O1Y8z?usp=sharing
@@SkySurvInc Thank you so much! I cant tell you how much I appreciate it.
Thanks for making this helpful video!
9:20 in the Optimize Camera Alignment box what are all those options. When I got to that point several were pre-selected but I don't know what they mean or if I should keep them selected.
Is it important to clean up the sparse cloud with the gradual selection tool? Would we do that before adding markers or after?
Thanks!
Great job.. this is a very helpful video for newcomers. Thank you for posting.
No problem. Thanks for watching!
Thank you for the help on getting Metashape into state plane. What is the best way to put in a ground scale factor?
How about generating DTM under high vegetation?I think manually deleting vegetation would be too laborious .
Is it possible to filter the photos with the markers on it so you can place markers easily?.
Great video. I wonder why didn't you use automatic marker detection? I think i saw that in some of your videos. Where you do automatic marker detection, rename points and than import points with coordinates.
Thanks. I wanted to show the manual way to assign the GCPs in this video. Honestly, automatic detection rarely works on my projects, except for very low flights/large targets. Glad you liked the video.
@@kellyness7915 Keep up with the videos, I would love to see more. Like feature extraction from point cloud for topographic maps.
elo,how to use automatic marker detection?
ruclips.net/video/EZfahR49lxA/видео.html
Any idea Why the building edges somewhat not proper in tiff file after processing???
What points are you importing in the beginning? Aren't the points auto imported from the photos?
Those would be ground control points. Used to achieve a high degree of accuracy.
Do you have a workflow with Multispectral Data? I surely would appreciate one. We use the Micasense.
Not multispectral. But I have done some thermal processing if that would help.
SkySurv LLC I actually have some thermal pictures as well. For research purposes, when we fly, we take RGB, MSS and thermal pictures.
Great videos I'm new to this how do you get it to take the grid of photos do you need a flight path then are u putting ground points out with a gps kit cheers. I'm guessing you need a really expensive drone to do this
You don't need to spend all that much on a drone($500-$1500). But the GPS equipment will set you back significantly more($5000-10,000!!)
with that big altitude errors between cameras and GCPs, should you uncheck cameras during optimization process? i was told since photoscan that they should be unchecked prior optimization, if non RTK drone is used, to avoid vertical incorrect reference information
You can uncheck the photos, or decrease their accuracy - where it will use the GCP coordinate(which should be set to a few CM, or 0.05' or so)
Can you share the dataset or similar to this
What are your computer specs? Are you processing on the cloud or on local hardware?
Processing locally. I have a i7 desktop SSD drive, 32gb ram and a GTX1080. It works great, but I'm sure the newer stuff would be much faster! i9 RTX2080...
Any tips on classification of points? I see Metashape has an automatic classification option that would certainly help get down to bare ground if it works well.
Thanks!
I have yet to have any luck with the automatic classification. It is not dependable for production use...
It's been my understanding that filter by confidence only displays the results of filtering but doesn't remove the low confidence points.. To remove the low confidence points we need to select and delete them before proceeding with the workflow. Now I need to do more research...
That is an option as well. Although, I prefer to classify them as "ground"
@@SkySurvInc
Thanks for the reply. I'll keep that in mind as I continue to learn more.
Is there a link to the dataset?
Hi! Great video! I'm getting an error when import the GCPs "can't find match for '01' entry. Create new marker". Would you what could it be?
Right click on the location of the GCP if you need to add a point!
please more video
hi
great video
where i can see the gcp file ?
How accurate this DEM could be?
maybe compliant with a 1 foot interval ASPRS standard.
what is the point of adding points or markers? is it necessary?
How to georeference?