[GRASS-user] v.lidar.edgedetection, v.surf.bspline and visualization issues

[Rebecca Bennett]

Actually they work just fine on linux Ubuntu (instruction in the regular download, no need to compile) even LASview... but I was under the impression Luis had access to a windows machine anyway so OS wasn't the problem.


Haven't tried LAStools on Mac...




>________________________________
> From: Michael Barton <Michael.Barton at asu.edu>
>To: "<grass-user at lists.osgeo.org>" <grass-user at lists.osgeo.org> 
>Cc: Rebecca Bennett <rabennett at ymail.com>; Luis Ramirez <lu.ramirez.c at gmail.com> 
>Sent: Tuesday, 27 August 2013, 15:24
>Subject: Re: [GRASS-user] v.lidar.edgedetection, v.surf.bspline and visualization issues
> 
>
>
>Unfortunately the full set of LAS tools only works in Windows.  
>
>
>FWIW, I've built them into my Mac GRASS binaries (i.e., the ones that are open source) so that you can use both.
>
>
>Michael
>
>______________________________
>C. Michael Barton 
>Director, Center for Social Dynamics & Complexity
>Professor of Anthropology, School of Human Evolution & Social Change
>Arizona State University
>Tempe, AZ  85287-2402
>USA
>
>
>voice: 480-965-6262 (SHESC), 480-965-8130/727-9746 (CSDC)
>fax:          480-965-7671(SHESC), 480-727-0709 (CSDC)
>www: http://csdc.asu.edu, http://shesc.asu.edu
>http://www.public.asu.edu/~cmbarton
>
>On Aug 27, 2013, at 12:00 PM, <grass-user-request at lists.osgeo.org>
> wrote:
>
>From: Rebecca Bennett <rabennett at ymail.com>
>>
>>Subject: Re: [GRASS-user] v.lidar.edgedetection, v.surf.bspline and visualization issues
>>
>>Date: August 27, 2013 6:02:20 AM MST
>>
>>To: "grass-user at lists.osgeo.org" <grass-user at lists.osgeo.org>
>>
>>Reply-To: Rebecca Bennett <rabennett at ymail.com>
>>
>>
>>
>>Hello Luis,
>>
>>
>>I'm about to commit a sacrilegious act on the GRASS-user list but it would seem that Martin Isenburg's LAStools software is more appropriate for this stage of your lidar processing.
>>
>>
>>http://rapidlasso.com/lastools/
>>
>>
>>My workflow is to do the tasks you mention below (including the point cloud visualization and DEM generation) in LAStools and then import the DEM / DTM to GRASS for all subsequent processing.
>>
>>
>>
>>Best,
>>Rebecca
>>
>>
>>Rebecca Bennett
>>Postdoctoral Associate, Wired! Group
>>Department of Art, Art History and Visual Studies
>>Duke University, Durham, NC
>>www.pushingthesensors.com
>>
>>
>>
>>>________________________________
>>> From: Luis Ramirez <lu.ramirez.c at gmail.com>
>>>To: grass-user at lists.osgeo.org 
>>>Sent: Monday, 26 August 2013, 9:03
>>>Subject: [GRASS-user] v.lidar.edgedetection, v.surf.bspline and visualization issues
>>>
>>>
>>>Hi there,
>>>
>>>I´m being working with Grass Gis just for few weeks. I´m trying to 
>>>generate a dsm and dtm from LIDAR data. I imported my data as LAS and i 
>>>was following the steps explained in the Grass Gis Book of neteler and 
>>>mitasova. However, I'am having some problems that are transforming an 
>>>easy task into a time-consuming-nightmare. the first thing that I do not 
>>>understand is why v.lidar.edgedetection works under Grass Gis 6.4. and 7 
>>>instaled in a Virtual machine with Ubuntu but not in Grass Gis 6.4. and 
>>>7 in a windows 7 Computer. after calculating the first two regions (from 
>>>9) it crashes. I tried to increment the parameters "see" and "sen" up to 
>>>the value 10. it is able to calculate a bit more but it still craches. 
>>>after googleing it i Just get information about a bug detected in 2006. 
>>>I would really apreciate to be able to run this module in a windows 7 
>>>computer. do you maybe have a clue?
>>>the second issue is related to v.surf.bspline. I am using a very small 
>>>map of 1km2 with 118798 points for testing (the goal is to use the 
>>>procedure for a map at least 20 times larger than this one). However, 
>>>Grass Gis 6.4 and 7 (for Ubuntu and For Windows) show me a warning 
>>>message. it says that it could take too long depending on the amount of 
>>>points. I already tried with different values for the parameters" sie" 
>>>and "sin" but it doesnt get any better. I just left the computer 
>>>calculating for few hours but I´m not really getting any result. do 
>>>anyone have an Idea what I´m doing wrong?
>>>Finally, I´m being trying to get a 3D visualization of the points but 
>>>both the monitors of the GUI and the wxs ended up crashing before I can 
>>>see a thing. is that a known problem? there is any known reason for such 
>>>a problem or even better, a solution or an alternative?
>>>
>>>Thank you in advance!
>>>
>>>Luis
>>>
>>>_______________________________________________
>>>grass-user mailing list
>>>grass-user at lists.osgeo.org
>>>http://lists.osgeo.org/mailman/listinfo/grass-user
>>>
>>>
>>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20130827/f73ead6a/attachment-0001.html>