On Tue, Feb 10, 2015 at 1:29 PM, Roel De Nijs <roel.den...@aquafin.be>
wrote:
> Hi list,
>
>
>
> We send a WMS GetMap-request (through OpenLayers) to geoserver for a set
> of layers. The number of comma-seperated values in the layers parameter
> ranges from 1 to 30.
>
>
>
> Some of our users are only allowed to see the objects of a certain
> geographic area like a city or a state. To implement this requirement, we
> currently add a cql_filter to the request and so for each layer (in the
> layers parameter) we add something like “WITHIN(the_geom, wktOfArea)”. This
> wktOfArea can get quite big and is thus repeated for every layer (resulting
> in a very big request). It works, but it’s slow.
>
>
>
> Are there any alternatives to implement this requirement? What’s
> considered tob e the best approach? I noticed the querylayer module (cross
> layer filtering) and because the cities and states are defined in a
> seperate geoserver layer, I assume this could be a (good) alternative...
>
>
The best match for your requirement is probably using GeoFence, among the
many security features, it can limit
the area by user, and it does so by integrating with GeoServer so that the
geometry is sent directly into the database
query, so think of it as a more efficient way to pass your cql filter.
Cross layer filtering is indeed another option that could work, if you do
all the security at a frontend application level,
instead of inside GeoServer.
Cheers
Andrea
--
==
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