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

Ed McNierney ed at topozone.com
Sun Feb 16 14:20:50 EST 2003

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

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
> could use the existing TIFF driver for the whole mosaic, but with
> 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?
understand that the georeferencing is insufficient to know where the
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
"viewer" subdirectory the best option for this?)

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