[gdal-dev] ERDAS Imagine to ERMapper

[nicholas.g.lawrence at mainroads.qld.gov.au]

> > > > > Hello,
> > > > >
> > > > > I have a large (19 Gigabyte) erdas imagine file which I
> > > > want to bring into
> > > > > ERMapper.
> > > > >
> > > > > I have downloaded the minimalist windows executables from
> > > > > http://trac.osgeo.org/gdal/wiki/DownloadingGdalBinaries
> > > > >
> > > > > I am running windows xp with 2 GB of RAM.
> > > > >
> > > > > I know I should use the gdal_translate command, but I am
> > > > unsure of the best
> > > > > output format.
> > > > >
> > > > > ecw won't work for the file size is too large.
> > > > >
> > > > > I thought GTiff would work, but I can't force BIGTIFF=YES
> > > > >
> > > > > Is there a plain old band-interleaved-by-line format
> > > > available?
> > > > >
> > > > > Regards,
> > > > > nick

> > > > Nick,

> > > > GDAL v1.5.0 has ERmapper's ERS/BIL format built-in.  You
> > > > could try that..

> > > > Brent Fraser

> > > Brent,

> > > I downloaded GDAL today, and according to the name of the
> > > zip file I do have v1.5

> > > But what is the short form of ERMapper's ERS/BIL format?
> > > I can not find it in the list of supported formats at
> > > http://www.gdal.org/formats_list.html

> > > Regards,
> > > nick

> > Me again.

> > I have found the short form for ERMapper's ERS/BIL format within
> > the help for gdal_translate itself.

> > I'm running the translate now. I'm guessing it will take hours
> > to complete.

> > Regards,
> > nick

> I should provide some background.

> I have an ERDAS Imagine file of 19 Gigabytes that I want to import
> into ERMapper. Two other files (next largest size is 16 Gigabytes)
> imported okay. I only have problems with the last image.

> The top half of the image is fine. The lower half is all black.

> My supplier can view the entire image at his end.

> I used ArcMap to open the image at my end and it is fine.

> This confirms that the file itself is okay.

> I downloaded GDAL v1.5 and used gdal_translate to go from
> ERDAS Imagine format to ERMapper format as I stated in my
> previous message.

> The processing has now finished, and the result is the same error
> of the lower half of the image being all black.

> So, GDAL is giving the same results for me as ERMapper does. But
> ArcMap displays it fine.

> Excuse me, I just thought of something.

> Okay, back again. I zoomed in with ArcMap, and after a while, the
> screen went all black. ERDAS Imagine has pyramid layers right? Is
> my problem that the pyramid layers are displaying fine but the
> lowest layer is bad? Is ArcMap initially displaying the pyramid
> layers whilst ERMapper and GDAL ignore the pyramid layers to
> access the raw data?

> Regards,
> nick

Problem solved.

The file was corrupt. I asked for it to be supplied a second time,
and the translation went fine.

Regards,
nick



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