date:20100402

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

2010-04-02 Thread Markus Neteler

Cameron,

On Thu, Apr 1, 2010 at 10:16 PM, Cameron Shorter
cameron.shor...@gmail.com wrote:
Thank you Marina,

(small correction: Maria)

That is a good example.
To be complete, could you also answer:
* What would be the proprietary equivalent software you would use?

I'll leave that to Maria.

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

... note that she actually *author* of the code. She and her team have
developed it over the last years.

* It seems you are officiated with a University?

She is professor there.

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?

I leave this again to Maria.

Best
Markus

maria.brove...@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=48sessionId=59resId=7materialId=slidesconfId=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.shor...@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

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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

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

2010-04-02 Thread maria . brovelli

Hi Cameron
Def. Quota Cameron Shorter cameron.shor...@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.brove...@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.

A detailed description is available here:

http://www.foss4g2006.org/getFile.py/access?contribId=48sessionId=59resId=7materialId=slidesconfId=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.shor...@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

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visit http://iso26300.info for more information.