[Geoserver-devel] SLD from Postgis or from GeoPackage

GeoServer GeoServer Developer
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1

Hi,

I think that the main question that GeoPackage folks must think about is if transferring the styles should be based on SLD or something else. The standard has existed since 2002 and still many well-known GIS software like ArcGIS, MapInfo, MapServer, Mapnik etc. do not really support SLD which makes me believe that they may not be so interested to do so in the future either.

But if SLD can offer interoperability between two software (Geoserver and QGIS) it is still better starting point than the other existing solutions which tend to be totally software specific.

-Jukka Rahkonen-

-----Alkuperäinen viesti-----
Lähettäjä: Jorge Gustavo Rocha [mailto:jgr@…4991…]
Lähetetty: 23. maaliskuuta 2018 16:37
Vastaanottaja: geoserver-devel@lists.sourceforge.net
Aihe: Re: [Geoserver-devel] SLD from Postgis or from GeoPackage

Hi Andrea,

This proposal is backed up by myself. I want to support the interoperability between QGIS and GeoTools/GeoServer. I'm also interested in improving GeoPackage.

Jeff Yutzler (OGC GeoPackage editor) confirms that there are no interoperable approaches to handle styling in GeoPackage for now, but he is committed to find a standard approach.

If we go forward with a sound proposal, we can get some more open source projects adopting our approach regarding "native" styles that can be delivered with the data. I can contribute with this approach to both GeoTools and QGIS. It will be even easier to support this in uDig.

If you or the PSC can help me to find additional resources to support this proposal, that would be very welcome. You comments are already a valuable contribution. Thanks!

Regards,

Jorge Gustavo

On 23-03-2018 13:04, Andrea Aime wrote:

Hi all,
just a reminder, the original motivation for proposal was first
introduced to avoid people going and starting changes without having
the resourcing to actually finish the work.
The people making the proposals are the same that need to fund it
(with their own time, typically, but nothing prevents others from
chiming in and helping of course).

This is something obvious for those that have contributed to the
project for a long time, but maybe not so for others. So... this
activity is funded/resourced already right?

Cheers
Andrea

On Fri, Mar 23, 2018 at 11:40 AM, Jody Garnett <jody.garnett@...403...
<mailto:jody.garnett@…403…>> wrote:

    We had a chance to write up a proposal for GeoTools - to introduce
    ResourceInfo2.getStyles():

    - https://github.com/geotools/geotools/wiki/ResourceInfo2-with-Style
    
<https://github.com/geotools/geotools/wiki/ResourceInfo2-with-Style&gt;

    I think allowing DataStore developers to control the presentation of
    their "native" styles is worth while.

    On Thu, Mar 22, 2018 at 9:44 AM Richard Duivenvoorde
    <rdmailings@...3975... <mailto:rdmailings@…3975…>> wrote:

        On 22-03-18 02:59, Jody Garnett wrote:
        > We have a similar need with shape files, the presence of a sidecar SLD
        > file is great way to pass styling around.
        >
        > At a GeoTools level I would love a way to "discover" a built-in style
        > for a layer so we could make it available for either a) GeoServer Data
        > Import (sadly that would just be a one time solution), or see we could
        > make a placeholder in the LayerInfo (maybe with a special default style
        > placeholder.
        >
        >
        > GeoTools does have a per layer "info" data structure used to pass meta
        > information on to the application, we could see about making the style
        > available in this manner.

        Hi Jody,

        about sidecar SLD: if I'm correct esri products used a lyr file
        next to
        a shapefile automatically if it had the exact same name.
        QGIS is doing the same when you have a .qml (QGIS stylefile)
        with the
        same name.
        Unfortunatly that does not work (yet) with sld files (in QGIS),
        but it
        could be a usable model... if you want to keep working with
        shapefiles :wink:

        In case of Geopackage/Spatialite I would think a 'packaged'
        style could
        be favoured over sld styles in Geoserver? Indeed it would be best if
        GeoTools could serve this information.

        Regards,

        Richard Duivenvoorde

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