[Qgis-user] How to display SID raster on QGIS 2.10 PISA Kubuntu 15.04 ?
Randal Hale
rjhale at northrivergeographic.com
Thu Aug 20 15:26:15 PDT 2015
If you want to you can download the MrSid SDK and uncompress the sids on
your linux workstation: http://www.lizardtech.com/downloads/category/
(MrSID SDK)
I downloaded the SDK (placed it in /home/rjhale/apps and wrote a very
small messy script that does the following:
#!/bin/bash
#set library path
export LD_LIBRARY_PATH=/home/rjhale/apps/sidgeodecode/bin
#fix the extension
file=$1
newname=`echo $file | sed 's/\(.*\.\)sid/\1tif/'`
#run the Geodecode program
/home/rjhale/apps/sidgeodecode/bin/mrsidgeodecode -wf -i $file -o $newname
It usually takes just a minute or two to uncompress them on my
workstation - for me a sid that is 400 mb usually uncompresses to 6 GB -
with a small amount of work (tiling, pyramid layers) it's renders very
nicely.
I agree - building sid support into QGIS is not for the faint of heart.
I did it once but decided against - I would rather just uncompress them
using this route and be done with it.
Randy
On 08/20/2015 06:06 PM, Bernd Vogelgesang wrote:
> Hi
>
> Am 20.08.2015, 17:41 Uhr, schrieb Joachim Bergerhoff <agimjo at gmail.com>:
>
>
> Dears, I guess the message title is explicit enough ?
>
>
> BTW, I have downloaded the SDK 9.1.0 from Imtech. The ReadMe says:
>
> "INSTALLATION:
>
> No specific installation is required to use the MrSID SDK beyond
> copying the SDK contents to your local machine.
>
> After installing, we suggest building and running the example
> program to assure correct installation and behaviour."
>
>
> But copying the SDK download (unpacked) somewhere on my disk
> obviously is not enough and I am lost when it comes to "building" etc.
>
> Thanks,
>
> Joachim
>
>
> As far as I know, there is no way, but building your own gdal with
> mrsid support und Linux. The instructions can be found somewhere in
> the qgis-maze, but I don't how up-to-date they are.
> I tried once, but as the instructions were not really idiot-proof and
> I prefer to use repositories, and as there was no clear instruction to
> be found how to deal with incompatibilities, I gave up so far.
>
> I think the masterbrains just compile everything, and the stupid
> masses use a virtual Windows machine to transform to geoTIFF (like me).
>
> There was an article mentioned in the list how to produce quite small
> geoTIFF some weeks ago:
> http://blog.cleverelephant.ca/2015/02/geotiff-compression-for-dummies.html
>
> That's all I can tell
> Bernd
>
>
> --
> Bernd Vogelgesang
> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
>
>
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--
-----------------
Randal Hale
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 rjhale at northrivergeographic.com
twitter:rjhale http://about.me/rjhale
http://www.northrivergeographic.com/introduction-to-quantum-gis
Southeast OSGEO: http://wiki.osgeo.org/wiki/Southeast_US
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