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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Dear Regina,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Just to wrap this one up – you were right!
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I decided to make the network file in arcgis and then import that into my postgis db. I then ran the same query but with the new polygon
and the totals were exactly the same as the point file and the data I extracted in QGIS.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">It is clear that I need to look at how I created the polygon in postgis (although whatever problems this caused they were ignored by
QGIS). Thankfully I can do what I need to do now (the polygon extraction takes around 25 minutes which is half the time the point file took and that will do !), and I am happy with the workflow.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Many thanks again for all of your help and there is no need to reply. I promise to be quiet for a while now.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Best wishes<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Darrel
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"></a><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> postgis-users [<a href="mailto:postgis-users-bounces@lists.osgeo.org">mailto:postgis-users-bounces@lists.osgeo.org</a>]
<b>On Behalf Of </b>Paragon Corporation<br>
<b>Sent:</b> 29 November, 2015 4:08 PM<br>
<b>To:</b> 'PostGIS Users Discussion' <<a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a>><br>
<b>Subject:</b> Re: [postgis-users] Help with SQL query?<o:p></o:p></span></p>
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</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Darrel,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I'm a bit confused about something. I thought concentrated was what you were using to determine whether or not to consider a pixel in the deposition
raster, so shouldn't the query be:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">WITH foo AS (<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> SELECT mymodel.deposition.rid, mymodel.networkpoly.gid, geom, ST_SummaryStats( ST_Clip(rast, geom) ) As st<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> FROM mymodel.deposition INNER JOIN mymodel.networkpoly ON ( ST_Intersects(rast,geom) )<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> WHERE filename='10_inci.tif'<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">SELECT sum( (st).sum)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">FROM foo;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">As your original query – was using deposition.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">CREATE TABLE mymodel.networkdep AS<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">SELECT filename, gid, ST_Value(rast, geom) val<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">FROM mymodel.deposition, mymodel.network<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">WHERE ST_Intersects(rast, geom)
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New"">ORDER BY gid, rid;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Gathering from the count it looks like all the pixels of those are treated as data when some should be treated as no data. If it's not an error
in the raster you are using,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">it would really help to get output of the polygon and also the other stats I mentioned which (st).* outputs So a query something like:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">WITH foo AS (<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> SELECT mymodel.concentrated.rid, mymodel.networkpoly.gid, geom, ST_SummaryStats( ST_Clip(rast, geom) ) As st<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> FROM mymodel.concentrated INNER JOIN mymodel.networkpoly ON ( ST_Intersects(rast,geom) )<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> WHERE filename='10_inci.tif'<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">SELECT rid, gid, geom, (st).*<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">FROM foo;<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">You might actually want to plot the geom on the map overlaid with the problem tiles (or original raster) you classified for that region.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">My guess is something went wrong in the ST_Reclass and all the pixels in those tiles did not get set to 0 (and thus are treated as
data doing a summary stats of the problem pre-reclassed tiles and looking at the min,max will give you a clue about that).<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">This second point may be moot if it's just you meant to put deposition instead of concentration, but good knowledge to keep in mind
for future troubleshooting.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hope that helps,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Regina<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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