[Qgis-developer] Snapping tolerance

[Zoltan Szecsei]

Hi,
+1 for renaming current snapping behaviour to "Layer Units" AND adding a 
global snapping-unit option, _perhaps_ as default option.

You very often want to snap in linear units regardless of layer CRS, so 
a possibility for doing that globally would be good.

Maybe if this option is chosen, it calls a subroutine to convert this 
linear unit into "Layer Units" and populates the "Snapping and 
Digitising Option" table for the user, in the layer units.

Regards,
Zoltan




On 2014/12/13 08:02, Martin Dobias wrote:
> Hi
>
> Recently I have been working on some snapping improvements (more about 
> that later) and I have found one slightly surprising thing about the 
> configuration of tolerances: if the tolerance unit is set to "map 
> units", it actually means "layer units" - i.e. units in layer's CRS 
> and not in project's CRS. Recently there was even a bug report filed 
> for that: https://hub.qgis.org/issues/11634
>
> I would like to change the behavior so that the "map units" in 
> snapping config dialog would mean units in project's CRS. Would there 
> be any objections?
>
> Alternatively we could just rename "map units" to "layer units" to 
> make it less surprising (and eventually add a third option to use 
> project's units).
>
> Cheers
> Martin
>
>
>
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Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
GIS and Photogrammetric Services

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