LASclip stops working unexpectedly

[Ethan Miller]

Hello,

Every time I run lasclip from the ArcMap (or ArcScene) version 10.3.1 I get an error box: "LASTools has stopped working." I used lasclip successfully last week so am now trying to figure out what is going on.

I can run lasinfo and other tools but not lasclip. I have tried modifying file names, running on other computers under different directories, and editing the polygon points in the shapefile to no avail. I have read the README and can't find any requirements that I'm missing.

I am using a .shp ("MCCTestEastLargeExtent.shp") that has a polygon made of 4 points, which create a closed area and do not overlap. See here: https://www.dropbox.com/s/yc33w24oz6md2it/MCCTestEastLargeExtent.zip?dl=0

The .las file ("EastAreaSparseFiltered.las") I am trying to clip is a sparse cloud with a total of 451,042 points and point density of 1.06 (in meters). See here: https://www.dropbox.com/s/l0pio8k4dg5gbjf/EastAreaSparseFiltered.las?dl=0

Both files are projected as WGS 1984 UTM Zone 17N. 

Does anyone have any suggestions or experience dealing with this issue?

Thanks so much for any help or advice in advance,

Ethan

[Bernardino J. Buenaobra]

Hi:

LAStools is quite efficient and s smaller program without any coupling inside a big relational dbase program like ArcGIS - I do it every time to "clip" on a script command using lasclip and have the clipped las for eventually =deriving DTM, DSM, Intensity and No. of Returns TIF file using blas2dem and lasgrid - then I connect my folder into ArcGIS and drag those rasters in flawlessly. I do no have issues of these like what you have in ArcGIS version 10.2.2.

Berns B.

---
Bernardino (Berns) Jerez Buenaobra
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From: last...@googlegroups.com [last...@googlegroups.com] on behalf of Ethan Miller [efmill...@gmail.com]
Sent: Tuesday, February 16, 2016 10:46 PM
To: LAStools - efficient tools for LiDAR processing
Subject: [LAStools] LASclip stops working unexpectedly

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[Martin Isenburg]

Hello,

I fixed it and Ethan has (off-list) confirmed that it works now. The SHP file he provided also crashed the ShapeViewer.exe [1] that I like using but QGIS and ArcGIS were able to open those it just fine. The issue was that the shapefile contained empty records (number_of_parts  == 0) that resulted in a crash. This seems a rare occurance.

[1] http://lastools.org/download/ShapeViewer.exe

Now it works both from the command line and the GUI. And Ethan has tested running it from the slow and expensive GUI for LAStools (aka ArcGIS (-;). 

D:\LAStools\bin>lasclip -v -i EastAreaSparseFiltered.las -poly MCCTestEastLargeExtent.shp -odix _clipped -olaz

WARNING: found record of shape type 5 with number_of_parts 0 and number_of_points 0. skipping ...

WARNING: found record of shape type 5 with number_of_parts 0 and number_of_points 0. skipping ...

creating clip polygon took 0 sec.

removed points 401581 (23689). outputting 49461 points took 0.236 sec.

done with 'EastAreaSparseFiltered_clipped.laz'. total time 0.236 sec.

This will be in the next release (up in a week or so).

Regards,

Martin