Lasground with profiling lidar (eg, ICESAT2)

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RG

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Jun 14, 2024, 7:29:00 AMJun 14
to LAStools - efficient tools for LiDAR processing
Hi,

I am trying to use lasground for ground classification of profiling lidar data. It comes from ICESAT2, a spaceborne lidar platform. ICESAT2 point cloud data already comes with ground classification but there are some obvious errors. Hence, I am trying to see if a better classification can be generated using lasground.

The linear point density of this lidar data is ~1.9 pts/m. The top view and the vertical profile for a 30m segment can be seen below.

Do you think the lasground algorithm is suitable for such data? Also, I would like to find any prior attempts where lasground was used on such profiling lidar data. Does anyone here know about any such work?

Regards
Ranjith.

prof.PNG





Jochen Rapidlasso

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Jun 14, 2024, 7:30:27 AMJun 14
to LAStools - efficient tools for LiDAR processing
Hi Ranjith,
please give lasground64 or lasground_new64 a try.

Best,

Jochen @rapidlasso

RG

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Jun 17, 2024, 12:03:21 PMJun 17
to LAStools - efficient tools for LiDAR processing
Hi Jochen,

Thanks. Quick question: Is there an algorithmic difference between lasground and lasground64? I have done quite some investigations with lasground and tuned some parameters. So I was wondering if I should repeat the exercise with lasground64.

Ranjith.

Jochen Rapidlasso

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Jun 17, 2024, 12:06:29 PMJun 17
to LAStools - efficient tools for LiDAR processing
Hi Ranjith,
lasground and lasground64 share the same algorithm. Due to rounding, there may be slight deviations (last digit).
lasground_new64 is a complete different algorithm, it is worth do do some exercise with this tool.
We recommend to use the 64 bit versions.

Cheers,

Jochen @rapidlasso
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