[Gdal-dev] Problems with creating PNG files

[Frank Warmerdam]

On Tue, 1 Mar 2005 14:11:51 -0000, Roger James
<roger at beardandsandals.co.uk> wrote:
>  
> I cannot seem to get any sensible output out of the png driver when using
> create_copy 
> 
> I made the attached test bitmap and tried it with gdal_translate. The output
> png is broken. 
> 
> I am using a CVS source a few hours old and linking against libpng-1.2.6. 

Roger,

Your redcross.png is not a PNG file, it is a TIFF file.  You need to use 
the "-of PNG" switch on the commandline to select output in png format.
GDAL utilities will not automatically select a format based on the extension.
Instead, they just default to TIFF format. 

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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