[GRASS-dev] Re: [GRASS-user] ECW data

Well, you can try, but that's what I'm doing and then getting the problems. And, for OSX, ECW still needs a bit of patching - a fix for Mac Intel and a reversion to an earlier source and a couple other minor changes.

On Jul 16, 2007, at 10:20 AM, Mars Sjoden wrote:

Just to add,

I found this:

http://trac.osgeo.org/gdal/wiki/ECW

I'll give it a try.

Mars

On 16-Jul-07, at 7:59 AM, Mars Sjoden wrote:

Thanks William,

Good to know.

I'll keep digging.

Mars

On 16-Jul-07, at 7:06 AM, William Kyngesburye wrote:

Normally you would use GDAL compiled with the ECW library support.

BUT, I can't get it to work on OSX. It always gives me invalid image errors, and others have the same problem so it's not just me. I've asked ERmapper (uh, Leica) about it, but they only officially support 10.3.9 PPC, which is not usable on 10.4 because of C++ compiler version differences. I've asked in their forums for any user/programmers that could help, but no response.

Strangely enough, GraphicConverter uses the ECW library and works, I think it uses different library calls to read them. But GC loses the geographic info, and it doesn't handle large files very well. Because it works in GC, I also have a bug report for GDAL, but also no action on it yet.

On Jul 16, 2007, at 12:30 AM, Mars Sjoden wrote:

  Hello,

I'm just wondering what the best way to import a 3.5GB .ecw file into GRASS is?

cheers,

Mars

-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
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