Dear Pierre,<br><br>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.<br>
<br>I am also ready to share the methodology which we have used. Basically we have used your tutorial as a guideline. <a href="http://trac.osgeo.org/postgis/wiki/WKTRasterTutorial01">http://trac.osgeo.org/postgis/wiki/WKTRasterTutorial01</a> Its very useful tool though we have faced some little problems.<br>
<br>Thanks & Regards,<br><br>Santosh<br><br><div class="gmail_quote">On Thu, Jun 9, 2011 at 6:54 PM, Pierre Racine <span dir="ltr"><<a href="mailto:Pierre.Racine@sbf.ulaval.ca">Pierre.Racine@sbf.ulaval.ca</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Thanks Santosh,<br>
<br>
Could you tell us more on what you do on the server side? "PGRaster" you mean PostGIS Raster? Or the old pgraster?<br>
<br>
Pierre<br>
<br>
> -----Original Message-----<br>
> From: <a href="mailto:postgis-users-bounces@postgis.refractions.net">postgis-users-bounces@postgis.refractions.net</a> [mailto:<a href="mailto:postgis-users-">postgis-users-</a><br>
> <a href="mailto:bounces@postgis.refractions.net">bounces@postgis.refractions.net</a>] On Behalf Of Santosh Gaikwad<br>
> Sent: Thursday, June 09, 2011 4:54 AM<br>
> To: PostGIS Users Discussion<br>
> Subject: Re: [postgis-users] How do you use PostGIS Raster?<br>
<div><div></div><div class="h5">><br>
> HI,<br>
><br>
> Look at the following application of Ecological Sensitive Area (ESA) of western<br>
> ghats (one of the biodiversity hotspot) of India. We have used PGRaster in this<br>
> case.<br>
><br>
> <a href="http://www.wetlandsofindia.org/geoserver/www/esa/esa.html" target="_blank">http://www.wetlandsofindia.org/geoserver/www/esa/esa.html</a> (It works well in<br>
> Firefox)<br>
><br>
> Thanks,<br>
><br>
> Santosh Gaikwad<br>
><br>
><br>
> On Thu, Jun 9, 2011 at 1:12 PM, Javier de la Torre <<a href="mailto:jatorre@vizzuality.com">jatorre@vizzuality.com</a>><br>
> wrote:<br>
><br>
><br>
> Hi,<br>
><br>
> We are planning on using it to calculate carbon sequestration on<br>
> protected areas. This is a project by the Convention on Biological Diversity<br>
><br>
> <a href="http://www.cbd.int/lifeweb/carbon/" target="_blank">http://www.cbd.int/lifeweb/carbon/</a><br>
><br>
> It basically is an intersection of a raster with bit vectors.<br>
><br>
> Best,<br>
><br>
><br>
> Javier.<br>
><br>
><br>
> On Jun 8, 2011, at 10:09 PM, Mathieu Basille wrote:<br>
><br>
><br>
> Dear Pierre,<br>
><br>
> Here, we are using PostGIS to analyze large datasets combining<br>
> rasters and vectors. Basically, we are looking at movement and habitat selection<br>
> in a predator-prey system, using GPS-collar data over large areas. The major use<br>
> of PostGIS Raster is for the intersection of prey steps (line segments or buffers<br>
> around these segments) with different raster: Landsat (landcover type), slope,<br>
> road density, relative probability of occurrence of the predator, etc. Note that<br>
> we first tried to use ArcGIS for this step, without success, due to many bugs and<br>
> the need to correct them by hand (which was largely too time-consuming). We<br>
> also used PostGIS Raster to intersect predator locations with the Landsat map to<br>
> estimate Resource Selection Functions (RSF) in order to build maps of relative<br>
> probability of occurrence. In the end, information of the intersections were used<br>
> in R to characterize movements of the preys on the landscape.<br>
><br>
> Best,<br>
> Mathieu Basille.<br>
><br>
><br>
> Le 03/06/2011 08:28, Pierre Racine a écrit :<br>
><br>
><br>
> Hi all,<br>
><br>
><br>
><br>
> I'm preparing a presentation and I need some use cases<br>
> for PostGIS Raster. I would be grateful if people already using the raster side of<br>
> PostGIS would describe what they already do it. Bborie, Jorge, Regina, others?<br>
> These uses cases are vital for the project.<br>
><br>
><br>
><br>
> On my side we are using PostGIS raster to do<br>
> raster/vector analysis over large datasets. Basically determining mean values for<br>
> temperature (raster), elevation (raster) for fauna observations (point buffers).<br>
> Converting everything to vector and using desktop solutions proved<br>
> impracticable for datasets covering the extent of Canada.<br>
><br>
><br>
><br>
> For those who did not try the raster extension yet, don't<br>
> be shy to express your planned experiments or your expectations.<br>
><br>
><br>
><br>
> Thanks all for your contribution to the project,<br>
><br>
><br>
><br>
> Pierre<br>
><br>
><br>
><br>
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> --<br>
> Santosh S. Gaikwad,<br>
><br>
> Geo-Informatics Officer,<br>
> Salim Ali Centre For Ornithology<br>
> & Natural History (SACON),<br>
> 12-13-588/B, Nagarjunanagar Colony,<br>
> Tarnaka,Hyderabad- 500017,<br>
> Andhra Pradesh,India.<br>
> <a href="http://www.wetlandsofindia.org" target="_blank">http://www.wetlandsofindia.org</a> <a href="http://sacon.org" target="_blank">http://sacon.org</a> Mobile : 91-8106736257<br>
> Homepage: <a href="http://www.wetlandsofindia.org/santosh/index.html" target="_blank">http://www.wetlandsofindia.org/santosh/index.html</a><br>
><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>Santosh S. Gaikwad,<br><br>Geo-Informatics Officer,<br>Salim Ali Centre For Ornithology<br>& Natural History (SACON),<br>12-13-588/B, Nagarjunanagar Colony,<br>
Tarnaka,Hyderabad- 500017,<br>Andhra Pradesh,India.<br><a href="http://www.wetlandsofindia.org" target="_blank">http://www.wetlandsofindia.org</a> <a href="http://sacon.org" target="_blank">http://sacon.org</a><br>Mobile : 91-8106736257<br>
Homepage: <a href="http://www.wetlandsofindia.org/santosh/index.html" target="_blank">http://www.wetlandsofindia.org/santosh/index.html</a><br><br>