Hello,
Is there a complete list online which tells me which GeoServer WPS functions can be called from within SLD?
I have also been wondering about the PointStacker as I have a layer with three categories of points in a single layer. I’m aware the function doesn’t have a group by function and that gs:Query can’t be chained so I don’t think it is currently possible but ideally I want to have multiple entries with the point stacker filtered by category. This would allow me to in effect render the three categories as separate colours and ensure that the categories are not grouped together.
This leads me to a general question of preference. I’d be interested to hear if you think 1) layers should be styled by attribute and filtered (i.e. the three categories in one layer) or 2) they should be split into views in the database (or sql_views in GeoServer) and presented as three layers?
Currently our group tend to us the later option but having started with ESRI products I tended to think the first option was better, after all, three types of road are all roads so they should be in the roads layer. It seems however that you are forced down the route of option two here if you want to use PointStacker.
Best Regards,
Paul
Hi Paul,
I’m guessing you’re working off this page (http://docs.geoserver.org/stable/en/user/styling/sld-extensions/rendering-transform.html) already. I can’t find anything else so my only suggestion would be to look in the code.
Looking in the repository, I see this is the only place that “PointStacker” appears - https://github.com/geoserver/geoserver/blob/bf0345d228111c15aeff6f7c1bc87b4ed230af96/src/extension/wps/wps-core/src/main/java/org/geoserver/wps/DeprecatedProcessFactory.java (Ctrl-F for it within the page), and I’d guess that the surrounding items are also potential transformations (but I don’t do Java so I’m likely about to be corrected…).
The other option is to take a look in the test SLD’s here: https://github.com/geoserver/geoserver/tree/338f0d8c3744c086168530679fcea0a8a666f249/src/wms/src/test/resources/org/geoserver/wms/wms_1_1_1 - those seem to be the only two places in the code-base that the term “PointStacker” appears.
Cheers,
Jonathan
---- On Thu, 04 Aug 2016 13:30:11 +0100 Paul WittleP.Wittle@anonymised.com wrote ----
Hello,
Is there a complete list online which tells me which GeoServer WPS functions can be called from within SLD?
I have also been wondering about the PointStacker as I have a layer with three categories of points in a single layer. I’m aware the function doesn’t have a group by function and that gs:Query can’t be chained so I don’t think it is currently possible but ideally I want to have multiple entries with the point stacker filtered by category. This would allow me to in effect render the three categories as separate colours and ensure that the categories are not grouped together.
This leads me to a general question of preference. I’d be interested to hear if you think 1) layers should be styled by attribute and filtered (i.e. the three categories in one layer) or 2) they should be split into views in the database (or sql_views in GeoServer) and presented as three layers?
Currently our group tend to us the later option but having started with ESRI products I tended to think the first option was better, after all, three types of road are all roads so they should be in the roads layer. It seems however that you are forced down the route of option two here if you want to use PointStacker.
Best Regards,
Paul
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