[mapguide-users] Preliminary MrSID and ECW Support

Greg Boone greg.boone at autodesk.com
Tue Jan 30 12:04:56 EST 2007

Hi Frank,

I do not think it would be a problem to upgrade GDAL to 1.4.0 in the FDO
Thirdparty Trunk. We could also consider adding a new build variable to
the FDO build process that would allow a user to specify a
non-thirdparty location to find GDAL. We could do the same for some of
the other thirdparty components as well.


-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Frank
Warmerdam (External)
Sent: Tuesday, January 30, 2007 12:33 PM
To: MapGuide Users Mail List
Subject: Re: [mapguide-users] Preliminary MrSID and ECW Support

Jose Manuel C G wrote:
> Well, I think the .ecw repositories files is not valid, and I need to
> a new Data and Layer calling the .ecw outside the repositories. 


I don't know what you mean about "ecw repositories files".

> Anyway the plugin works fine on the spanish OS version too.
> Great work! congratulation :)
> Note: Would you like to publish in the wiki page of the proyect a
> to compile the sources and generate the necesary .dlls?

Frankly it turned out to be somewhat of a nightmare - partly because FDO
is still using GDAL 1.3.1.  I had to write custom makefiles for the GDAL
gdal/frmts/ecw and gdal/frmts/mrsid directories, backport the GDAL 1.4.0
driver, and modify how parts of the GDAL core gets built so some extra
interfaces are exposed.  Some of this was already resolved in GDAL 1.4.0
once we upgrade to that things should be easier.

So, no, I'm not keen on documenting it.  It would actually be somewhat
to just go into the thirdparty\GDAL directory and modify the nmake.opt
to enable mrsid and ecw directly inside the GDAL build.  This is the
way this is handled, and the documention in the nmake.opt is basically
all I
normally offer to GDAL developers.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam,
warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGeo,

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