[Gdal-dev] MrSID, ECW formats unusable when RasterIO is used - GDAL 1.3.1 - USER ERROR

[Sergey Malgin]

All, 

MrSID problem: User error. Had older copy of DSDK in my search path.
Thanks to Martin Chapman for giving me a clue.

ECW problem: User error (bug in output georef generator)
Sorry about this. Stupid mistake.

I have no more problems. My prototype works now. 
Keep up great job, guys.

PS I wonder how much faster it would be if I use AdviseRead()... I'll try it
soon enough :)

Sergey Malgin
ESRI, Inc

> -----Original Message-----
> From: Chapman, Martin [mailto:MChapman at sanz.com]
> Sent: 18 января 2006 г. 13:40
> To: Frank Warmerdam; Sergey Malgin
> Cc: gdal-dev at lists.maptools.org
> Subject: RE: [Gdal-dev] MrSID,ECW formats unusable when RasterIO is used -
> GDAL 1.3.1
> 
> Sergey,
> 
> We had the same problem in 1.3.1.  You need to upgrade to the latest
> version of GDAL and use the MrSID version 5.x SDK.  That problem has
> been fixed.
> 
> Martin
> 
> -----Original Message-----
> From: gdal-dev-bounces at lists.maptools.org
> [mailto:gdal-dev-bounces at lists.maptools.org] On Behalf Of Frank
> Warmerdam
> Sent: Wednesday, January 18, 2006 2:27 PM
> To: Sergey Malgin
> Cc: gdal-dev at lists.maptools.org
> Subject: Re: [Gdal-dev] MrSID,ECW formats unusable when RasterIO is used
> - GDAL 1.3.1
> 
> On 1/18/06, Sergey Malgin <smalgin at esri.com> wrote:
> > It looks like RasterIO method doesn't use MrSID multiresolution
> support. It
> > takes 80 seconds to get data from 3.5MB SID file. I am trying to get
> full
> > extent with output dimensions set to approx. 500x500 pixels.
> 
> Sergey,
> 
> There were some quirks with multiresolution level selection that may
> have still existed in the code in 1.3.1.  You might want to try a
> nightly
> snapshot of GDAL and see if the problem persists.  If it does, please
> submit a minimal program, a file and any supported needed details
> for me to reproduce the problem.
> 
> > 2. ECW problem.
> >
> > I have 2.5GB ECW. It shows full extent very fast, but when I zoom in a
> > little, I get back blank image! If I continue to zoom in, eventually I
> get
> > the data from lowest pyramid level.
> 
> I haven't encountered anything like this.  Once again, I
> would suggest you try a nightly snapshot.  What version of
> the ECW SDK are you using?
> 
> 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    | Geospatial Programmer for Rent
> 
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