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Hi,<br>
<br>
The new versions of ECW SDK is only available on Windows (4.0 to
4.2). The ReadOnly Windows version is free and Read/Write Windows
version (desktop and server) is profitable. I believe that there is
a project of porting SDK on Linux but it's not currently available
(<a class="moz-txt-link-freetext" href="http://field-guide.blogspot.com/2011/07/erdas-ecwjp2-sdk-for-linux.html">http://field-guide.blogspot.com/2011/07/erdas-ecwjp2-sdk-for-linux.html</a>)
and we don't know the coming licensing policy.<br>
<br>
If you want to convert ECW to tif+worldfile on Linux, you need to
recompile gdal agaisnt the 3.3 ECW library (which is no longer
maintained by ERDAS since 2007). Be carreful, I noted a suspect
behaviour of this library under Linux (I will send a post this
week-end on this subject with more details). If you want, I believe
you can find ubuntu binaries of this library here :
<a class="moz-txt-link-freetext" href="http://geomatips.blogspot.com/2010/09/mise-jour-paquet-ecw-pour-ubuntu.html">http://geomatips.blogspot.com/2010/09/mise-jour-paquet-ecw-pour-ubuntu.html</a>
(french website) <br>
<br>
At last, in order to get georeferencing informations embedded in ECW
file, you can use the DATUM,
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UNITS<b> </b>and PROJ options (<a class="moz-txt-link-freetext" href="http://www.gdal.org/frmt_ecw.html">http://www.gdal.org/frmt_ecw.html</a> -
code defintion are contained in
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ecw_cs.wkt file) or/and assign an EPSG code with -a_srs option in
GDAL_TRANSLATE.<br>
<br>
Hope to help...<br>
<br>
Best regards<br>
<br>
Sylvain<br>
<br>
Le 17/02/12 10:31, Zoltan Szecsei a écrit :
<blockquote cite="mid:4F3E1E55.4050105@geograph.co.za" type="cite">Hi,
<br>
I have a bunch of ecw images that I need to convert to
tif+worldfile.
<br>
<br>
I therefore need to recompile gdal against the ecw libraries, but
the only file I can download from Intergraph/Erdas website is:
<br>
ECWJP2SDKSetup_RO_20110303.exe
<br>
which is a Windows install of the SDK.
<br>
<br>
How do I do this for Linux?
<br>
(Want to batch convert them on ubuntu 10.04)
<br>
<br>
On another note, I notice that the xml files received with the ecw
images only have projection info in them, and not the
georeferencing info.
<br>
Is the georeferencing info embedded in the ecw files (like
geotiff)? I tried looking in the ecw file with a binary editor,
but saw nothing obvious.
<br>
<br>
TIA,
<br>
Zoltan
<br>
<br>
<br>
</blockquote>
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