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

[Cameron Shorter]

Maria,
Under what circumstances should we recommend people use GRASS over 
Terrasolid Terrascan, and under what circumstances should they stick 
with Terrasolid Terrascan?

I can see that GRASS is better if you plan to write your own algorithm, 
because you have access to the source code.
I'm hoping that we can recommend GRASS for more than that?

Do people chain GRASS inside Web Processing Services?

maria.brovelli at diiar-topo.polimi.it wrote:
> 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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>>
>> -- 
>> 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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-- 
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