[Qgis-user] Textual representation of styles ?

Wed Aug 8 02:44:07 PDT 2018

Hi all, 

Appreciate your advice. If there are any more resources concerning this, please let me know. Exporting SLD file in QGIS seems to result in SLD 1.0 file, without an option to influence the version. 

Simple SLD tests seem to prove Andrea right. I’ve tried to implement a SLD style that has unique symbols for over 10,000 features. Apparently it is validated by Geoserver, but previewing the style on a file, I get nothing. I guess this kind of styling is simply too heavy or otherwise error prone? 

Cheers,

Ville Koivisto

+35840 701 4283

GIS Expert

Suomen kuntotekniikka Oy

From: Andrea Aime <andrea.aime at geo-solutions.it> 
Sent: Wednesday, August 8, 2018 11:23 AM
To: Richard McDonnell <richard.mcdonnell at opw.ie>
Cc: ville.koivisto at kuntotekniikka.fi; qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] Textual representation of styles ?

This approach is "old news", if you're using newer versions of QGIS (3+) and GeoServer (hum... 2.13 works, not sure from when, probably 2.11)

then trying to switch it from SLD 1.1 down to SLD 1.0 should be unnecessary, GeoServer should read the exported styling directly.

There are still however various limitations, GeoSolutions launched a crowdfunding initiative some time ago that so far only gathered funds for

label exports (available in QGIS 3.0), but failed to get funds for the rest:

https://www.geo-solutions.it/news/crowdfunding-qgis-geoserver-styling-interoperability/

Cheers

Andrea

On Wed, Aug 8, 2018 at 10:14 AM Richard McDonnell <richard.mcdonnell at opw.ie <mailto:richard.mcdonnell at opw.ie> > wrote:

Hi,

You can implement it in Geoserver, it just takes a little editing. 

Generally what works for me is using something like Notepad++ to:-

1.      Remove all Instances of <se:Description>…</se:Description>

2.      Change all Instances <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc"> to <ogc:Filter>

3.      Removing all instances of se:

4.      Change all instances of SvgParameter to CssParameter

This usually sorts any issues out, you will of course need to validate it in GeoServer.

Hope this helps!

Regards,

Richard.

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GIS Specialist | FRM Data Management 

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From: Ville Koivisto [mailto:ville.koivisto at kuntotekniikka.fi <mailto:ville.koivisto at kuntotekniikka.fi> ] 
Sent: 08 August 2018 06:28
To: Richard McDonnell <richard.mcdonnell at opw.ie <mailto:richard.mcdonnell at opw.ie> >; 'Lars I. Nielsen, LIFA A/S' <lin at LIFA.DK <mailto:lin at LIFA.DK> >; qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org> 
Subject: RE: [Qgis-user] Textual representation of styles ?

Good morning,

Wait, so I can’t straight away use an SLD file generated in QGIS for styling my layers in Geoserver? Is there any more info about his somewhere? 

Thanking you in advance,

Ville Koivisto

+35840 701 4283

GIS Expert

Suomen kuntotekniikka Oy

From: Qgis-user <qgis-user-bounces at lists.osgeo.org <mailto:qgis-user-bounces at lists.osgeo.org> > On Behalf Of Richard McDonnell
Sent: Tuesday, August 7, 2018 5:24 PM
To: Lars I. Nielsen, LIFA A/S <lin at LIFA.DK <mailto:lin at LIFA.DK> >; 'qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org> ' <qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org> >
Subject: Re: [Qgis-user] Textual representation of styles ?

Hi Lars,

Would SLD be what you ar looking for?

http://www.opengeospatial.org/standards/sld

QGIS can save its styles to this format, be aware, its not a full implementation of SLD, so it takes a little tweaking to make it work with other SLD compliant software line GeoServer.

Hope it helps,

Richard.

From: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Lars I. Nielsen, LIFA A/S
Sent: 07 August 2018 14:50
To: 'qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org> ' <qgis-user at lists.osgeo.org <mailto:qgis-user at lists.osgeo.org> >
Subject: [Qgis-user] Textual representation of styles ?

Hi list.

Does QGIS utilize and support textual styles, e.g. as read from data ?

OGR has a feature style specification (https://www.gdal.org/ogr_feature_style.html ), with some examples shown below.

Has anyone used QGIS to facilitate such style representation ?

--

Here are some example style definition strings: 

*	A 5 pixels wide red line: 
PEN(c:#FF0000,w:5px) 
*	A polygon filled in blue, with a black outline: 
BRUSH(fc:#0000FF);PEN(c:#000000) 
*	A point symbol: 
SYMBOL(c:#00FF00,id:"points.sym-45,ogr-sym-7") 
*	A text label, taking the text string from the "text_attribute" attribute field: 
LABEL(f:"Times New Roman",s:12pt,t:{text_attribute})" 

Here is what a style table that contains all the above styles could look like: 

    road:      PEN(c:#FF0000,w:5px)

    lake:      BRUSH(fc:#0000FF);PEN(c:#000000)

    campsite:  SYMBOL(c:#00FF00,id:"points.sym-45,ogr-sym-7")

    label:     LABEL(f:"Times New Roman",s:12pt,t:{text_attribute})

--

I know that QGIS supports its own XML style format, and supports some form of SLD. Both are layer based, though, not feature based.

Med venlig hilsen

Lars I. Nielsen, LIFA A/S
GIS konsulent, FME Certified Professional

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