Lasclip not working consistently

[James Carracher]

Hi,

So I have a script that I run reasonably frequently on 50GB chucks of mobile lidar data. The script takes a line (the trajectory) of where the lidar has driven and buffers it in FME automatically. Then it uses that in a lasclip to get rid of anything outside the buffer. 

Normally this process would take at most half an hour. However, for the current data set it is taking a VERY long time. As in it is barely half way through after two days and the messages in the command line are just cycling through "WARNING...Using brute_locate". 

Does anyone know why this is and how I could fix it? I have tried making the shapefile manually in other programs and changing settings but no luck. Nothing makes if faster

My FME script is:
Generaliser > bufferer > dissolver > geometry validator > writer

And lastools
lasclip -cpu64 -i %WORK_DIRECTORY%\temp12_pre2\*.laz ^
    -ignore_class 0 1 15 16 17 18 19 21 22 25 ^
    -poly %WORK_DIRECTORY%\_Input_comps\Rail_clip_0-1.shp ^
    -interior ^
    -donuts ^
    -classify_as 11 ^
    -odir %WORK_DIRECTORY%\temp13_rail1 -olaz ^
    -cores %NUM_CORES%

Any help would be appreciated

[Möst, Karin (LDBV)]

Hi James,

 

did you check the coordinate system. Maybe run lasinfo first

 

Regards

Karin

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[James Carracher]

Hi Karin,

Yes, I've checked the coordinate system of both the point cloud and the shape file

Thanks

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[James Carracher]

Hi, 
Does anyone else have any ideas? I haven't been able to solve this problem. For this dataset the clipping takes an inexplicably long time compared to other similar datasets

Regards