Classfication and merge into 1000x1000 tiles

[Alejandro Gomez]

Hello, I am trying to classify and merge 16gb of laz files into 1000x1000 tiles for OCAD (orienteering software) to use it to create a vegetation map.

The laz files are unclassified and split into 364 individual files. I don't have any experience what so ever, so I would appreciate a little guidance on how to achive this using the LASTools. The viewer shows lines of data but they are all separate.

Is there anything I could do?

Thank you,
Alejandro.

[LAStools - efficient tools for LiDAR processing]

Hi Alejandro,

for detail information about a tool please see the doc at the "Documentation" tab.

A very simple workflow could look like this:

# index all your input files

lasindex64 -i *.laz

# create working dir and tile

md tiles

lastile64 -i *.laz -odir tiles -olaz

# get ground points

md ground

lasground_new64 -i tiles\*.laz -odir ground -olaz

# get height above ground

md height

lasheight64 -i ground\*.laz -odir height -olaz -replace_z

# do classification

md class

lasclassify64 -i height\*.laz -odir class -height_in_z

# create vegetation shapes for med and high vegetation

lasboundary64 -i class\*.laz -o veg_med.shp -keep_class 4

lasboundary64 -i class\*.laz -o veg_high.shp -keep_class 5

Please test with ONE exemplary file and adjust additional arguments according to the documentation.

To test it is a good idea to use laslook as you did.

For final processing you can export/put all in a batch-file and use an additional "-core [n]" argument, dependent on your computer capabilities.

Cheers,

Jochen @rapidlasso