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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If you update your source tree you will get st_setvalue()
implemented today!<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Have fun and share with us your nice plpgsql functions. I have a
page in the wiki where we can put those new functions:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a
href="http://trac.osgeo.org/postgis/wiki/WKTRasterUsefulFunctions">http://trac.osgeo.org/postgis/wiki/WKTRasterUsefulFunctions</a><o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Pierre<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
postgis-users-bounces@postgis.refractions.net
[mailto:postgis-users-bounces@postgis.refractions.net] <b>On Behalf Of </b>George
Silva<br>
<b>Sent:</b> 21 juillet 2010 12:46<br>
<b>To:</b> PostGIS Users Discussion<br>
<b>Subject:</b> Re: [postgis-users] How to Construct a raster in pl/pgsql
function?<o:p></o:p></span></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'>Hello Pierre,<br>
<br>
That will do just fine.<br>
<br>
Thanks for your help.<br>
<br>
George<o:p></o:p></p>
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<p class=MsoNormal>On Wed, Jul 21, 2010 at 12:42 PM, Pierre Racine <<a
href="mailto:Pierre.Racine@sbf.ulaval.ca">Pierre.Racine@sbf.ulaval.ca</a>>
wrote:<o:p></o:p></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>Hi George,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>Unfortunalely st_setvalue is not yet
implemented. You could have created an empty raster (st_makeemptyraster) and
set the pixels values with st_setvalue.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>The only way to create a raster and set
specific pixels value now is to generate the HEX values representing the raster
and to cast them to ::raster. You will find the best example of this in
regress/</span> <span style='font-size:11.0pt;color:#1F497D'>create_rt_band_properties_test.sql
in the source tree.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>Pierre</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt'>From:</span></b><span style='font-size:10.0pt'> <a
href="mailto:postgis-users-bounces@postgis.refractions.net" target="_blank">postgis-users-bounces@postgis.refractions.net</a>
[mailto:<a href="mailto:postgis-users-bounces@postgis.refractions.net"
target="_blank">postgis-users-bounces@postgis.refractions.net</a>] <b>On Behalf
Of </b>George Silva<br>
<b>Sent:</b> 21 juillet 2010 09:59<br>
<b>To:</b> PostGIS Users Discussion<br>
<b>Subject:</b> [postgis-users] How to Construct a raster in pl/pgsql function?</span><o:p></o:p></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hello
guys,<br>
<br>
I'm trying to write a function to calculate flow direction using SQL, in moving
windows of 9x9 pixel size.<br>
<br>
How can I write a output raster? What is the way to create a specific raster?<br>
<br>
George<br clear=all>
<br>
-- <br>
George R. C. Silva<br>
<br>
Desenvolvimento em GIS<br>
<a href="http://blog.geoprocessamento.net" target="_blank">http://blog.geoprocessamento.net</a><o:p></o:p></p>
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<p class=MsoNormal><br>
<br clear=all>
<br>
-- <br>
George R. C. Silva<br>
<br>
Desenvolvimento em GIS<br>
<a href="http://blog.geoprocessamento.net">http://blog.geoprocessamento.net</a><o:p></o:p></p>
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