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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">Dear All<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">I’m trying to use the MapServer Tile Indexes to create a map service, and ultimately a WMS, of some DSM data but am getting an Internal Server Error.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">The DSM data are organised as 466 5 × 5 km rasters with a resolution of 1 × 1 m with a total size of 69.2 GB. The data format is Esri ASCII GRID.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">To test the use of Tile Indexes in MapServer I used the gdaltindex to create an index shapefile for just twenty of the 5 × 5 km rasters and created a basic map file:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas">MAP<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> IMAGETYPE PNG<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> EXTENT 240000 100000 250000 150000<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> SIZE 400 2000<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> PROJECTION<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> "init=epsg:27700"<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> END<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> LAYER<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> NAME "tiled-rasters"<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> STATUS ON<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> TILEINDEX "/datastore/b81071f2-85b3-4e31-8506-cabe899f989a/b81071f2-85b3-4e31-8506-cabe899f989a_copy/index_file"<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> TILEITEM "location"<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> TYPE RASTER<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> PROJECTION<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> "init=epsg:27700"<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> END<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas"> END<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:Consolas">END<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">When I request an image of the map with the URL
<a href="http://localhost:8080/cgi-bin/mapserv?map=/vagrant/maps/tiled-rasters.map&layer=tiled-rasters&mode=map">
http://localhost:8080/cgi-bin/mapserv?map=/vagrant/maps/tiled-rasters.map&layer=tiled-rasters&mode=map</a> I get an “Internal Server Error”.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">Therefore I created a second index shapefile using the gdaltindex tool that only contained one of the 5 × 5 km rasters and updated the map file to point to the second index shapefile.
When I request an image of the map I can see an image of the DSM data as expected.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">Therefore, am I asking too much of the tile indexing approach in MapServer to work against a massive dataset – 69.2 GB in 466 raster datasets – or have MapServer users been able to get
tile indexing too work in MapServer against large data volumes and can provide some guidance.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">Many thanks in advance of any help that MapServer users can offer.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas">Best wishes, Simon.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
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