[postgis-users] How do you use PostGIS Raster?

[Pierre Racine]

Thanks Javier,

Nice application. What do you use now and why do you plan on using PostGIS? Is it possible to upload a shapefile and get the carbon sequestrated for the area covered by the shapefile?

Pierre

> -----Original Message-----
> From: Javier de la Torre [mailto:jatorre at vizzuality.com]
> Sent: Thursday, June 09, 2011 3:42 AM
> To: PostGIS Users Discussion
> Cc: Marie-Cla at lists.refractions.net; Pierre Racine; ude Labbé
> Subject: Re: [postgis-users] How do you use PostGIS Raster?
> 
> 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
> 
> 
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> 
> 	--
> 
> 	~$ 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.
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