[Gdal-dev] GDAL data model, caching, GDALProjDef

[Ed McNierney]

Derrick -

1) No, you'll need to do that externally.  If you can give me some info
about what kind of images you're working with, I'll try to make
suggestions.

2) I never noticed the "viewer" subdirectory before <g>.  It's there in
CVS but not in the distribution - the code looks pretty old.  There are
lots of viewers out there - what kind of data are you trying to view?

	- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
Phone: (978) 251-4242  Fax: (978) 251-1396
ed at topozone.com


-----Original Message-----
From: Derrick J Brashear [mailto:shadow at dementia.org] 
Sent: Sunday, February 16, 2003 2:09 PM
To: gdal-dev at remotesensing.org
Subject: Re: [Gdal-dev] GDAL data model, caching, GDALProjDef

On Thu, 13 Feb 2003, Frank Warmerdam wrote:

> I would actually suggest handling the image as one large TIFF file
> with tiling, pre-built overviews and deflate/zip compression.  Then
you
> could use the existing TIFF driver for the whole mosaic, but with
similar 
> performance characteristics.   This assumes the result is not larger
> than 4GB.

It hadn't actually occurred to me to try this before. I do have one
question, and one unrelated question:

1) Is there a way I'm overlooking to decollar collared maps (in GeoTIFF
form) or is it expected that an external program would be used for this?
I
understand that the georeferencing is insufficient to know where the
image
corners are, but I have other data which can be used for this.

2) Is there a simple viewer wrapped around GDAL I can point someone at
who wants to support GDAL in an existing viewer program? (Is what's in
the
"viewer" subdirectory the best option for this?)


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