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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Perhaps it is something like this (from
<a href="http://trac.osgeo.org/gdal/wiki/frmts_wtkraster.html">http://trac.osgeo.org/gdal/wiki/frmts_wtkraster.html</a>)<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">“Reading raster data from the database<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">If you want to use the GDAL WKT Raster driver, you must provide a connection string as Dataset's name. The syntax of this connection string is
(the quotes may be ommitted):<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">PG:"host='<host>' port:'<port>' dbname='<dbname>' user='<user>' password='<password>' [schema='<schema>'] [table='<raster_table>'] [where='<sql_where>']
[mode='<working_mode>']"<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I would test first by using the string for one image as DATA of your raster layer before to continue towards TILEINDEX+TILEITEM.<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">-Jukka Rahkonen-<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Dave Barter wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">I’ve figured this out,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span lang="EN-US" style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">CREATE MATERIALIZED VIEW mapping_os_opendata_raster.streetview_tileindex AS SELECT rid as location, S</span><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">T_ConvexHull(rast)
as shape from mapping_os_opendata_raster.streetview <o:p></o:p></span></p>
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<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">“location" needs to be a path to the database/table/raster currently it is just returning an ID, but I cannot find any documentation as to how to construct this for postgres<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">So nearly there?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif";color:black">On 20 August 2014 at 11:34:03, Dave Barter (<a href="mailto:dave.barter@gmail.com">dave.barter@gmail.com</a>) wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">Final question. How should my map file look in order to get the raster tile from the database not the file system?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">LAYER<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> # CREATE MATERIALIZED VIEW mapping_os_opendata_raster.streetview_tileindex AS SELECT rid as location, ST_ConvexHull(rast) as shape from mapping_os_opendata_raster.streetview <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> NAME streetview_tileindex<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> TYPE polygon<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> PROJECTION<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> "init=epsg:27700"<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> END<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> CONNECTIONTYPE postgis<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> CONNECTION “********"<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> DATA "shape from (SELECT shape,location FROM mapping_os_opendata_raster.streetview_tileindex) AS FOO USING UNIQUE location using srid=27700"<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> END<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> LAYER<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> #RASTER TILE LAYERS MUST RUN FROM A TILEINDEX<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> NAME streetview<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> TYPE RASTER<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> STATUS ON<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> TILEINDEX "streetview_tileindex"<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> TILEITEM "location"<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> OFFSITE 0 0 0 <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> PROJECTION<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> "init=epsg:27700"<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> END<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> DEBUG 5<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> EXTENT 0 0 3000000 1000000<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""> END<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">This is not working as the layer street view returns an error:- <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">msDrawMap(): Image handling error. Failed to draw layer named 'streetview'. msDrawRasterLayerLow(): Unable to access file. Corrupt, empty or missing file '654016' for layer
'street view’.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif"">I set SHAPEFILE “” at the top of the file, but am unclear as to how the streetview layer will retrieve the tile ?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">-- <br>
Dave Barter<br>
<br>
Web: </span><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><a href="http://www.phased.co.uk/" target="_blank"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">http://www.phased.co.uk</span></a></span><span style="font-family:"Arial","sans-serif""><br>
</span><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><a href="mailto:Email%3Adave@phased.co.uk" target="_blank"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">Email:dave@phased.co.uk</span></a></span><span style="font-family:"Arial","sans-serif""><br>
Twitter:@Citizenfishy</span><span style="font-size:10.0pt;font-family:"Helvetica","sans-serif""><o:p></o:p></span></p>
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