[gdal-dev] GDAL precision for Geometry object

[Even Rouault]

Le samedi 10 octobre 2015 17:56:24, Hermann Peifer a écrit :
> On 2015-10-10 14:06, Even Rouault wrote:
> > The implementation of ExportToWKT() in GDAL uses 15 decimal figures
> > ("%.15f" printf formatting) whatever the source precision was, and as
> > you point, whatever the intrinsic precision of the double value is.
> 
> Does "%.15f" have any added value over "%.15g" (in the usual real-life
> GIS situations, I mean). I also vaguely remember some posting/ticket
> about "%.15f" versus "%.15g", including a request to partially revert a
> changeset. This was years ago, and I can't find at the moment.

Hum I thought that WKT didn't allow scientific notation for coordinates, but 
actually checking at http://portal.opengeospatial.org/files/?artifact_id=25355 
(SFA 1.2.1), page 52, it seems legal. So perhaps this could be changed. 

> 
> Hermann
> 
> 
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