Hi Kris,<div> The WMS is a cunning plan but this is going into a location (a fire command vehicle) where simplicity is key; setting up a GeoServer instance would add complexity that would require maintainence. Also QGIS 2.0 seems a little flaky with WMS, at least for us. A single file would be optimal.</div>
<div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><span style="font-family:Verdana;font-size:12px">I do understand the use of JP2 and ECW for such large datasets, should work fine too actually.</span></blockquote>
<div>QGIS 2.0, or at least the weekly builds, doesn't include support for either of these two formats as far as I can tell otherwise I'd just use them and save myself the bother of conversion.<br><div><br></div>
<div>I'll have to look into the VRT stuff - I've not tried them before.</div><div><br></div><div>Thanks,</div><div>Jonathan</div><br><br><div class="gmail_quote">On 20 August 2013 12:27, Kris Nackaerts <span dir="ltr"><<a href="mailto:knackaerts@gmx.net" target="_blank">knackaerts@gmx.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Verdana;font-size:12.0px"><div>
<div>Hi,</div>
<div> </div>
<div>I would serve them as WMS via geoserver if that is an option. That's how we do it at the research institute I work. You could tile them in tiles of reasobale size first. Geoserver is easy to setup and configure, again, if that is an option.</div>
<div> </div>
<div>What I also use for larger datasets is gdal VRT: keep the imagery tiled, create one single image as a virtual dataset. I do understand the use of JP2 and ECW for such large datasets, should work fine too actually.</div>
<div> </div>
<div>Regards and good luck,</div>
<div> </div>
<div>Kris Nackaerts</div>
<div>
<div name="quote" style="margin:10px 5px 5px 10px;padding:10px 0 10px 10px;border-left:2px solid #c3d9e5;word-wrap:break-word">
<div style="margin:0 0 10px 0"><b>Gesendet:</b> Dienstag, 20. August 2013 um 13:10 Uhr<br>
<b>Von:</b> "Jonathan Moules" <<a href="mailto:jonathanmoules@warwickshire.gov.uk" target="_blank">jonathanmoules@warwickshire.gov.uk</a>><br>
<b>An:</b> <a href="mailto:qgis-user@lists.osgeo.org" target="_blank">qgis-user@lists.osgeo.org</a><br>
<b>Betreff:</b> [Qgis-user] Large raster datasets in 2.0</div>
<div name="quoted-content"><div><div class="h5">Hi list,
<div> We have some large raster datasets that are mosaiced into a single product. QGIS 1.7 (and I think 1.8) could access these in JP2 or ECW, but 2.0 doesn't seem to be able to (or maybe that's a limitation of the weeklies and the final thing will be compiled with it?).</div>
<div> </div>
<div>Due to the size of the rasters combined with a bug in GDAL that causes it to take literally a month to process the overviews for super-large rasters (about 450,000 * 440,000), we can't create them as a GeoTIFF.</div>
<div> </div>
<div>So the question - how do I use super-large rasters as a single contiguous dataset in QGIS 2?</div>
<div> </div>
<div>Thanks,</div>
<div>Jonathan</div>
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