lasview for dummimes

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Mikael Sejersen

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Dec 13, 2018, 6:57:37 AM12/13/18
to LAStools - efficient tools for LiDAR processing
Hi, 

I have not been using lasview (yet), but see that it has quite a potentonal. One reason that I have not been using is it seams to be missing a true cross section tool.

Any way lasview can make a "terrascan like" cross section? 
(example attached)  

/Mikael 
RawLaser_Building1 .PNG

Jochen Bind

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Dec 13, 2018, 4:09:52 PM12/13/18
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Hi Mikael,

Have you tried the procedure described here: https://rapidlasso.com/2014/03/02/tutorial-manual-lidar-editing/

 

You can select a box of just one row or column to be your cross-section. However, I don’t think  you can do completely arbitrary cross-section (i.e. at any angle other than 0 and 90 degrees). Also, do you just want to inspect the cross-section or save them as a file?

 

Hope this helps,

Jo
Jochen Bind
Hydrodynamics and GIS Technician
T +64-3-343-8021  
National Institute of Water & Atmospheric Research Ltd (NIWA)
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Mikael Sejersen

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Dec 14, 2018, 6:24:24 AM12/14/18
to LAStools - efficient tools for LiDAR processing
Hi Jo, 

Thank you for your reply. 
Yes I have read the tutorial and as you say, there is no option to do a arbitrary angle. That would for sure bo most of the trick. The other part would be to to lock (or set) the view angle perpendicular to the z axis.
I do not see any need to save the cross sections for this purpose. 
Am I the only one seeing this to be a "must have" for at simle view/editing tool? 

/Mikael    

Jean-François Bourdon

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Dec 14, 2018, 7:05:29 PM12/14/18
to LAStools - efficient tools for LiDAR processing
I often use the freeware FugroViewer to view cross sections (at any angle in the XY plane). The downside of this freeware is that you cannot edit points, it's really only a viewer. It would be great if lasview had the same viewing capabilities as it also already has editing functions. It is also very intuitive to move around the point cloud in FugroViewer (only mouse click, no toggle through keyboard shortcuts).

Martin Isenburg

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Apr 4, 2019, 4:36:48 PM4/4/19
to LAStools - efficient command line tools for LIDAR processing
Hello,

the latest release of LAStools (version 190404) add the possibility for an cross section at an arbitrary angle. Other changes are:

 4 April 2019 -- e572las: read spherical coordinates and populate VLRs with name, guid, description, sensorModel, ...
 3 April 2019 -- lasview: pick profile line: press 'x', hold <SHIFT>, draw line, press 'x', adjust width in pop-up menu
 1 April 2019 -- lasview: new options '-load_gps_time' and '-load_gps_second' to display time stamp when p<i>cking point
31 March 2019 -- LASzip, LASlib, LAStools: better LASzip license thanks to Amir Said. upgrade to version 3.4 revision 0
23 March 2019 -- lasreturn: bug fix for incorrect parsing of bin size when using option '-histo return_distance 0.1'
21 March 2019 -- lasoverage: new '-classify_as 18' to give overage / overlap points classification different from 12
20 March 2019 -- lasoverage: new option '-entire_overlap' to classify, flag, or delete *all* points in overlap area 
19 March 2019 -- LASlib, LASzip, LAStools: bug fix in "legacy class" decompressing new point types with "class > 31"

Regards,

Martin @rapidlasso



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