[Qgis-developer] Exported SLD size or displacementX/Y are not reimported correctly due to mm/pixel ambiguity

[Luigi Pirelli]

The fact is that in the qgssymbollay[v2]utils.cpp there are already
all encode/decode UOM stuffs since 2012 (by G.Sucameli), but these
static routines seems not used in any part of qgis code. I'm still
investigating...
Luigi Pirelli

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On 25 January 2017 at 20:56, Jorge Gustavo Rocha <jgr at di.uminho.pt> wrote:
> Hi,
>
> Maybe we can add support for uom (units of measure), like in [1], in the
> export and import to/from SLD. I think we could archive better
> compatibility if we use real world units. The uom attribute is
> necessary. Numbers only have meaning when they also have units. I would
> like to try this approach.
>
> The qgis-geoserver-plugin uses a fixed SIZE_FACTOR = 4 to convert units
> from QGIS (mm) to Geoserver (pixels).
>
> Regards,
>
> Jorge Gustavo
>
> [1] http://geoserver.geo-solutions.it/edu/en/pretty_maps/style_uom.html
>
> I think we should review all this import export
>
> Às 16:38 de 25-01-2017, Andrea Aime escreveu:
>> On Wed, Jan 25, 2017 at 4:21 PM, Luigi Pirelli <luipir at gmail.com
>> <mailto:luipir at gmail.com>> wrote:
>>
>>     BTW this suggest that any export fix would check also import side to
>>     maintain QGIS consistency.
>>
>>
>> Yep... sorry I was not aware that the geoserver plugin was doing
>> round-tripping of styles,
>> never used it seriously and noticed the possibility to round trips
>> styles only a couple
>> of weeks ago
>>
>> Cheers
>> Andrea
>>
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>
> J. Gustavo
> --
> Jorge Gustavo Rocha
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