[gdal-dev] AAIGrid decimal precision

[Frank Warmerdam]

Volker Wichmann wrote:
> Hi,
> 
> I have the following problem: the format of my data is originally 
> arc/info ascii with two decimals (e.g. 1002.35). For processing, I need 
> to use/convert to GeoTiff (Float32). And in the end, I use 
> gdal_translate to write the processed data again as arc/info ascii. But 
> now there are over 10 decimals written (e.g. 2003.73324423545) which 
> causes the file to take about twice the size of the original raster.
> so my question is actually if there is any control on the decimal 
> precision written to ascii files? I see that the AAIGrid driver uses " 
> %6.20g" for printing, so I could patch this. But it would be nicer to 
> have a feature like a driver creation option to specify the number of 
> decimals desired.

Volker,

I would encourage you to file an enhancement request for this.  It would
be quite easily to add some sort of precision control creation option.

Best regards,
-- 
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