[gdal-dev] Minor documentation problem

[John Donovan]

Ah yes, I can see what you mean now. OK, maybe not tautological, but it
certainly made me stop for a moment to figure it out!

-JD

-----Original Message-----
From: Frank Warmerdam [mailto:warmerdam at pobox.com] 
Sent: 05 October 2010 15:54
To: John Donovan
Cc: gdal-dev at lists.osgeo.org
Subject: Re: [gdal-dev] Minor documentation problem

John Donovan wrote:
> Hi all,
> I was just perusing the gdalwarp page on www.gdal.org/gdalwarp.html, 
> when I noticed this tautological sentence:
> 
> "Mosaicing into an existing output file is supported if the output 
> file already exists."
> 
> Any idea what it is meant to say? I presume it is something to do with

> the bounds of an existing output file being used instead of those of 
> the input.

John,

It means if the output file already exists then it will be mosaiced into
as opposed to a new file being created.  It isn't just the bounds of the
existing file that are utilized - the whole file is used and the only
thing altered is the pixels replaced as part of the warp/mosaic
operation.

I don't think the statement is tautological, but it does seem to be less
than clear, and perhaps a bit redundant.

Best regards,
-- 

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