[OpenLayers-Users] Problems with large datasets, WFS, alternatives.

[Diego Guidi]

a way taht I suggest you is to use the getfeature tool to select only
a subset of your data.
http://dev.openlayers.org/releases/OpenLayers-2.10/examples/getfeature-wfs.html

Diego Guidi



On Thu, Mar 10, 2011 at 4:35 AM, Phil Scadden <p.scadden at gns.cri.nz> wrote:
> I have a rather large dataset of lines (1000s of them) which is
> displayed efficiently enough in WMS. The problem comes when I try to
> query them. (Eg everything within a user-created polygon). The query
> works fine, but it returns GML for the geometry and this can be very
> large. Queries become exceedingly slow. I would normally use this GML to
> draw the selected features in a vector layer.
>
> At moment, the only solution I can come up with is query against a
> version of the dataset that has been severely decimated (display proper
> shape in WMS, and query against generalised layer in WFS). A better
> solution??? would be return only non-geometry feature fields and there
> was a way to show the selected feature via a WMS layer. (get server to
> draw the selected features by WMS with filter and show that layer). Is
> this possible?
> --
> Phil Scadden, Senior Scientist GNS Science Ltd 764 Cumberland St,
> Private Bag 1930, Dunedin, New Zealand Ph +64 3 4799663, fax +64 3 477 5232
>
>
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