[postgis-users] How do you use PostGIS Raster?
Santosh Gaikwad
santosh at osgeo.in
Fri Jun 10 03:48:58 PDT 2011
Dear Pierre,
We have used WKTRaster for vector raster analysis for ESA. Then we have put
the results on the web. If you click on search option the website which I
have given then you will see a dialog box which has criteria where you can
select ESA option and then select any of the western ghat state and provided
5 min and 1 min data (right now we just have 1 min data for Goa state) and
after doing search it displays the result in coloured grid. If you click on
it, then you get the rank values which shows how important that grid from
ESA point of view.
I am also ready to share the methodology which we have used. Basically we
have used your tutorial as a guideline.
http://trac.osgeo.org/postgis/wiki/WKTRasterTutorial01 Its very useful tool
though we have faced some little problems.
Thanks & Regards,
Santosh
On Thu, Jun 9, 2011 at 6:54 PM, Pierre Racine
<Pierre.Racine at sbf.ulaval.ca>wrote:
> Thanks Santosh,
>
> Could you tell us more on what you do on the server side? "PGRaster" you
> mean PostGIS Raster? Or the old pgraster?
>
> Pierre
>
> > -----Original Message-----
> > From: postgis-users-bounces at postgis.refractions.net [mailto:
> postgis-users-
> > bounces at postgis.refractions.net] On Behalf Of Santosh Gaikwad
> > Sent: Thursday, June 09, 2011 4:54 AM
> > To: PostGIS Users Discussion
> > Subject: Re: [postgis-users] How do you use PostGIS Raster?
> >
> > HI,
> >
> > Look at the following application of Ecological Sensitive Area (ESA) of
> western
> > ghats (one of the biodiversity hotspot) of India. We have used PGRaster
> in this
> > case.
> >
> > http://www.wetlandsofindia.org/geoserver/www/esa/esa.html (It works well
> in
> > Firefox)
> >
> > Thanks,
> >
> > Santosh Gaikwad
> >
> >
> > On Thu, Jun 9, 2011 at 1:12 PM, Javier de la Torre <
> jatorre at vizzuality.com>
> > wrote:
> >
> >
> > Hi,
> >
> > We are planning on using it to calculate carbon sequestration on
> > protected areas. This is a project by the Convention on Biological
> Diversity
> >
> > http://www.cbd.int/lifeweb/carbon/
> >
> > It basically is an intersection of a raster with bit vectors.
> >
> > Best,
> >
> >
> > Javier.
> >
> >
> > On Jun 8, 2011, at 10:09 PM, Mathieu Basille wrote:
> >
> >
> > Dear Pierre,
> >
> > Here, we are using PostGIS to analyze large datasets
> combining
> > rasters and vectors. Basically, we are looking at movement and habitat
> selection
> > in a predator-prey system, using GPS-collar data over large areas. The
> major use
> > of PostGIS Raster is for the intersection of prey steps (line segments or
> buffers
> > around these segments) with different raster: Landsat (landcover type),
> slope,
> > road density, relative probability of occurrence of the predator, etc.
> Note that
> > we first tried to use ArcGIS for this step, without success, due to many
> bugs and
> > the need to correct them by hand (which was largely too time-consuming).
> We
> > also used PostGIS Raster to intersect predator locations with the Landsat
> map to
> > estimate Resource Selection Functions (RSF) in order to build maps of
> relative
> > probability of occurrence. In the end, information of the intersections
> were used
> > in R to characterize movements of the preys on the landscape.
> >
> > Best,
> > Mathieu Basille.
> >
> >
> > Le 03/06/2011 08:28, Pierre Racine a écrit :
> >
> >
> > Hi all,
> >
> >
> >
> > I'm preparing a presentation and I need some use
> cases
> > for PostGIS Raster. I would be grateful if people already using the
> raster side of
> > PostGIS would describe what they already do it. Bborie, Jorge, Regina,
> others?
> > These uses cases are vital for the project.
> >
> >
> >
> > On my side we are using PostGIS raster to do
> > raster/vector analysis over large datasets. Basically determining mean
> values for
> > temperature (raster), elevation (raster) for fauna observations (point
> buffers).
> > Converting everything to vector and using desktop solutions proved
> > impracticable for datasets covering the extent of Canada.
> >
> >
> >
> > For those who did not try the raster extension yet,
> don't
> > be shy to express your planned experiments or your expectations.
> >
> >
> >
> > Thanks all for your contribution to the project,
> >
> >
> >
> > Pierre
> >
> >
> >
> > _______________________________________________
> >
> >
> > postgis-users mailing list
> >
> >
> > postgis-users at postgis.refractions.net
> >
> >
> >
> http://postgis.refractions.net/mailman/listinfo/postgis-
> > users
> >
> >
> >
> > --
> >
> > ~$ whoami
> > Mathieu Basille, Post-Doc
> >
> > ~$ locate
> > Laboratoire d'Écologie Comportementale et de Conservation
> de
> > la Faune
> > + Centre d'Étude de la Forêt
> > Département de Biologie
> > Université Laval, Québec
> >
> > ~$ info
> > http://ase-research.org/basille
> >
> > ~$ fortune
> > ``If you can't win by reason, go for volume.''
> > Calvin, by Bill Watterson.
> > _______________________________________________
> > postgis-users mailing list
> > postgis-users at postgis.refractions.net
> >
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> >
> >
> >
> >
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> >
> >
> >
> >
> >
> >
> > --
> > Santosh S. Gaikwad,
> >
> > Geo-Informatics Officer,
> > Salim Ali Centre For Ornithology
> > & Natural History (SACON),
> > 12-13-588/B, Nagarjunanagar Colony,
> > Tarnaka,Hyderabad- 500017,
> > Andhra Pradesh,India.
> > http://www.wetlandsofindia.org http://sacon.org Mobile : 91-8106736257
> > Homepage: http://www.wetlandsofindia.org/santosh/index.html
> >
>
> _______________________________________________
> postgis-users mailing list
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>
--
Santosh S. Gaikwad,
Geo-Informatics Officer,
Salim Ali Centre For Ornithology
& Natural History (SACON),
12-13-588/B, Nagarjunanagar Colony,
Tarnaka,Hyderabad- 500017,
Andhra Pradesh,India.
http://www.wetlandsofindia.org http://sacon.org
Mobile : 91-8106736257
Homepage: http://www.wetlandsofindia.org/santosh/index.html
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