Hello!
I’m extremely new to WebODM and drone mapping in general. I was able to generate a point cloud using the software and was wondering if I could get the x y z coordinates of all the points? I was playing around and found a feature to get coordinates of a single point, However, is there a way I could get the x y z data from all points.
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Hello and welcome,
The simplest way is to add the pc-csv parameter I think. It will generate a csv file with all the points coordinates.
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Welcome!
Bernarde got you on the right path. Bear in mind that depending upon the size of your point cloud, such a file could be very difficult to work with!
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Yes and for huge clouds asking this type of file will likely require a lot of time.
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oh wow, that’s a little worrying. I have a very basic laptop and I feel like this might max out the RAM. I’ll give it a try nevertheless and report back. Thank you so much all!
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Text files aren’t indexed and are an inefficient storage for data like this, hence things like LAS/LAZ and other binary formats.
Depending upon what you want to do with the CSV, using something like CSVed can be nice since it will cache parts of the file smartly, keeping it responsive without being too heavy.
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Thank you so much for your input, I’m new so I’m still learning the different types of files etc. The images I’m working with are (that I got online from https://dronemapper.com/sample_data/) :
https://onedrive.live.com/?authkey=!ACwsh1vJO09eZaE&id=D9F325FED7BC0502!2658&cid=D9F325FED7BC0502
My goal is to find the rate of change in elevation between each tree crown by calculating the slope from the DSM model of these images.
I believe the only way I can do this is to obtain the x, y, and z values of all the points and perform some calculations in MATLAB
do you think if I work with smaller sets of images, it would easier to process?
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Aha! Grab that DSM and let QGIS do the calculations for you. (A quick google of QGIS, dem, and slope will get you there).
And we can help more if you get stuck from there.
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Thank you for saving me so much time! I just got the slope model through QGIS. I appreciate all of your help so much
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