LiDAR Paper by John Kirk and Andrew Kirmse

[bdloftin77]

Saw this in an email thread and am just starting to read it. I thought some here might be interested.

https://essopenarchive.org/users/955971 ... /lidar.pdf

[peter303]

So there are 2337 peaks above 10K in Colorado. That should keep the list-baggers busy. I wonder how many of these peaks have names?

[Boggy B]

Interesting. I once thought it might be fun to try and write an algorithm to automatically calculate prominences from LPCs, but if we're filtering out man-made features like cairns then doing this without manual intervention seems impossible, regardless of accuracy in the measurements and classification of returns. Even AI wouldn't be of much use for identifying stacked rocks since the control for that has to be sourced from recent beta organically. I suppose if we could map the highpoints within cm's of (horizontal + vertical) precision then you might train a model to successfully distinguish a cairn from a natural feature in many cases.

Thanks for the post!

[Scott P]

Interesting. I once thought it might be fun to try and write an algorithm to automatically calculate prominences from LPCs

I believe Peakbagger does that, but often their elevations come out a little lower than the LoJ manually calculated LiDAR elevations. When there is a discrepancy, PB is always lower, so the must be filtering out man made objects somehow. Perhaps whatever auto calls they are doing are over-filtering at times? I'm not sure.

[Boggy B]

I mean, a rock is a rock. A person or AI might distinguish between a stack of rocks and a natural rock in a photo. Neither can tell the difference from a very imprecise 3D model of the same (excepting the ridiculous windbreaks on some summits, because they're big enough). I thought I read somewhere that PeakBagger uses DEMs, so that would explain general inaccuracy and loss of resolution.

[HikerBox]

(excepting the ridiculous windbreaks on some summits, because they're big enough)

If you don't climb to the top of the windbreak the summit doesn't count

[Mtnman200]

(excepting the ridiculous windbreaks on some summits, because they're big enough)

If you don't climb to the top of the windbreak the summit doesn't count

If you don't do a headstand, the summit doesn't count.

Carl Blaurock headstand.jpg

[Boggy B]

Isn't that capturing the moment he bungled the jump and faceplanted into the summit?

[HikerBox]

(excepting the ridiculous windbreaks on some summits, because they're big enough)

If you don't climb to the top of the windbreak the summit doesn't count

If you don't do a headstand, the summit doesn't count.

Truth!