[gdal-dev] GDAL precision for Geometry object

[Even Rouault]

Le vendredi 16 octobre 2015 17:57:10, Hermann Peifer a écrit :
> On 2015-10-12 11:28, Even Rouault wrote:
> > I've changed to '%.15g' formatting for WKT in
> > https://trac.osgeo.org/gdal/ticket/6145
> 
> Hi Even,
> 
> Why did you choose '%.15g', rather than '%.17g'? The latter format
> should guarantee a lossless binary->decimal->binary round-trip, whereas
> the former one might also do -- or not. I don't think that any precision
> loss between '%.15g', and '%.17g' would result into "a real life
> problem", I am asking just out of curiosity.

Hi Hermann,

re'adding the list in CC.

Your point is valid. My idea was to avoid making WKT returned by the modified 
version potentially longer than it is currently

This should perhaps be configurable to accomodate for different use cases.

Even

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