That doesn't surprise me at all: how far a peak is from a higher one, and how steep its rocks are, should have nothing to do with its prominence or elevation. They should be uncorrelated just like latitude and longitude.josephnephi wrote: ↑Tue Nov 05, 2024 3:54 pm This suggests that the Elevation, Rise, and Saddle are the most important features. I was surprised to see Isolation and YDS being so inconsequential!
*PSA* - Ranked Lists Changing based off LiDAR Analysis
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seano
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Re: *PSA* - Ranked Lists Changing based off LiDAR Analysis
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Scott P
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Re: *PSA* - Ranked Lists Changing based off LiDAR Analysis
I believe 1' is what is being used for the cutoff being used for soft ranked peaks with LiDAR, at least on LoJ since peaks are being analyzed individually.
The soft rank margin should be greater for sites where peaks are analyzed automatically rather than individually. For whatever reason, it seems that peaks being analyzed automatically come up with lower values than those being analyzed individually.
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jkirk
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Re: *PSA* - Ranked Lists Changing based off LiDAR Analysis
That's because peak-finding algorithms have only ground points to work with in 3DEP DEMs. The reality is there are a lot of features (rocks, boulders, talus, pinnacles, cairns, buildings, towers, animals, people, etc.) available in the raw tiles that get skipped (some correctly skipped, some not) by ground-point classification algorithms. Careful raw tile analysis by a human is the best bet for accuracy.
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Boggy B
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Re: *PSA* - Ranked Lists Changing based off LiDAR Analysis
^ This, and a great in-depth discussion by Eli here: https://www.14ers.com/forum/viewtopic.p ... 20#p760120
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Scott P
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Re: *PSA* - Ranked Lists Changing based off LiDAR Analysis
That makes sense and I noticed that you posted in detail on this thread (I posted in that thread, but missed the post you made later).jkirk wrote: ↑Wed Nov 06, 2024 5:25 pmThat's because peak-finding algorithms have only ground points to work with in 3DEP DEMs. The reality is there are a lot of features (rocks, boulders, talus, pinnacles, cairns, buildings, towers, animals, people, etc.) available in the raw tiles that get skipped (some correctly skipped, some not) by ground-point classification algorithms. Careful raw tile analysis by a human is the best bet for accuracy.
https://www.14ers.com/forum/viewtopic.p ... er#p792703
I'm old, slow and fat. Unfortunately, those are my good qualities.