[GRASSLIST:3158] Re: processing of LIDAR data
massimiliano.cannata at supsi.ch
Wed Apr 14 03:44:41 EDT 2004
Brovelli and I have just posted in the CVS di GRASS 5.3 in
src.contrib/POLIMICO/* the commands to process lidar data.
Try them and please report eventual bugs.
Robert S. Nuske wrote:
>Does anybody has any experience with LIDAR data processing within GRASS or
>could point me to any resources?
>I am looking especially for ways to extract a DTM from LIDAR data of
>forested areas, but also for any general advice on LIDAR data processing
>My main problem at the moment is still the extraction of a DTM (points
>representing the bare earth) from the LIDAR point cloud. So, I am looking for
>ways to filter effectively point clouds. I will use LIDAR data of dense Sitka
>spruce stands. This data has a quite high overall point density (3-4 points
>per sqm), but the number of ground hits is naturally very low ("penetration"
>rate less than 20%).
>The only thing I have read so far is the GRASS Book (Open Source GIS: A GRASS
>GIS approach) and Brovelli's paper (LIDAR Data Filtering and DTM Interpolation
>Thanks for your comments.
> Robert S. Nuske
> Forest Research
> Northern Research Station
> Roslin, Midlothian EH25 9SY
> Scotland, UK
> email: robert.nuske at forestry.gsi.gov.uk
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