[OSGeo-Discuss] What GeoSpatial Open Source Software do Surveyors use?

[maria.brovelli at diiar-topo.polimi.it]

Hi Cameron
Def. Quota Cameron Shorter <cameron.shorter at gmail.com>:

> Thank you Marina,
> That is a good example.
> To be complete, could you also answer:

> * What would be the proprietary equivalent software you would use?

to filter the LiDAr point cloud the most used software is  Terrasolid  
Terrascan
(http://www.3dlasermapping.com/en/airborne/software/terrascan.htm)  
which is a very powefull tool.


>
> * Why did you decide to use GRASS instead of proprietary software?
> (Hopefully more than "it was cheaper")


because we developed original algorithms for filtering.
In any case filtering LiDAR data with a high accuracy level is quite  
impossible if you decide to simply use  an authomatic procedure. Our  
method can be an alternative to Terrascan (being the algorithms  
completely different from those implemented in Terrascan) to verify  
the authomatic detection of  terrain points.


>
> * It seems you are officiated with a University? Industry is more  
> convinced by case studies that come out of industry, as universities  
> are often associated with "smart geeks, who have a high tollerance  
> to things going wrong because they can fix it themselves". Is there  
> a non-education affilition you can draw upon? Did you do this work  
> for a governement department or similar?

No, I work at Politecnico di Milano (so, University) and the  
development of such tools has been made in the frame of a national  
(italian) research project.

Cheers.
Maria



>
> maria.brovelli at diiar-topo.polimi.it wrote:
>> Dear Cameron
>> if you are interested also in LiDAR data filtering (to obtain from  
>> the LiDAR point cloud the digital terrain model), we developed   
>> commands into GRASS. They have to be used in sequence.
>>
>> http://grass.osgeo.org/gdp/html_grass64/v.lidar.edgedetection.html
>> http://grass.osgeo.org/gdp/html_grass64/v.lidar.growing.html
>> http://grass.osgeo.org/gdp/html_grass64/v.lidar.correction.html
>> http://grass.osgeo.org/gdp/html_grass64/v.surf.bspline.html
>>
>> A detailed description is available here:
>>
>> http://www.foss4g2006.org/getFile.py/access?contribId=48&sessionId=59&resId=7&materialId=slides&confId=1 a more recent and summarised version can be found  
>> here:
>>
>> http://geomatica.como.polimi.it/corsi/remote_sensing/LiDAR_filtering_with_GRASS-lab4.pdf We worked also on calibration of  the filtering parameters (around 20 parameters) by integrating the USGS UCODE and GRASS. Details are available  
>> here:
>>
>> http://www.isprs.org/proceedings/XXXVIII/1_4_7-W5/paper/Brovelli-126.pdf
>>
>> I hope it helps.
>>
>> Cheers.
>> Maria
>>
>>
>>
>>> ----- "Cameron Shorter" <cameron.shorter at gmail.com> wrote:
>>>
>>>> I'm giving a presentation on GeoSpatial Open Source at the
>>>> international
>>>> Surveyors conference here in Sydney.
>>>> http://www.fig2010.com/
>>>>
>>>> I'd like advice on what use cases and Open Source packages I should
>>>> focus on during the presentation.
>>>> Feedback from Surveyors welcomed.
>>>>
>>>> -- 
>>>> Cameron Shorter
>>>> Geospatial Solutions Manager
>>>> Tel: +61 (0)2 8570 5050
>>>> Mob: +61 (0)419 142 254
>>>>
>>>> Think Globally, Fix Locally
>>>> Geospatial Solutions enhanced with Open Standards and Open Source
>>>> http://www.lisasoft.com
>>>>
>>>> _______________________________________________
>>>> Discuss mailing list
>>>> Discuss at lists.osgeo.org
>>>> http://lists.osgeo.org/mailman/listinfo/discuss
>>>
>>>
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>>
>>
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>
>
> -- 
> Cameron Shorter
> Geospatial Solutions Manager
> Tel: +61 (0)2 8570 5050
> Mob: +61 (0)419 142 254
>
> Think Globally, Fix Locally
> Geospatial Solutions enhanced with Open Standards and Open Source
> http://www.lisasoft.com
>
> _______________________________________________
> Discuss mailing list
> Discuss at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/discuss
>



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