[Qgis-user] RE wfs usage for "big data"

[Steve.Toutant at inspq.qc.ca]

http://mapserver.org/fr/ogc/wfs_server.html#mapserver-wfs-extensions
But I don't know how to use these parameters with qgis

Also, WFS has been improve with Mapserver7, much much faster when using 
filter on a postgis database. If you plan to use WFS I suggest you update 
to MS7, if you have any control on the server of course.




Michael Werner Maur <michael.maur at vermkv.rlp.de> 
2015-06-02 01:51
Veuillez répondre à
Michael Werner Maur <michael.maur at vermkv.rlp.de>


A
"steve.toutant" <steve.toutant at inspq.qc.ca>
cc

Objet
Re: RE [Qgis-user] wfs usage for "big data"








It is almost POINT Geometry. The datasource is a Postgis Database. The 
server
ist the UMN Mapserver.

Is there perhaps a posibility to customize the request in QGis, so that 
you for
examle take the first 5000 object, and after this the next 5000 and so on 
?

> Steve.Toutant at inspq.qc.ca hat am 1. Juni 2015 um 16:18 geschrieben:
> 
> 
> That is a lot of features to retrieve and render.......and lead to 
problem 
> with any tool (browser, qgis or other gis)
> Do you know the datasource format? (shp, postgis, .....)
> Do you know what is the WFS server?
> 
> getfeature request with a filter to query 7 milions features could work 
> well, but retrieving all or many data and rendering them is probably to 
> much, not only for qgis
> 
> What is the need for a WFS? That could help to propose a better 
solution?
> 
> 
> 
> 
> Michael Werner Maur <michael.maur at vermkv.rlp.de>@lists.osgeo.org 
> Envoyé par : qgis-user-bounces at lists.osgeo.org
> 2015-06-01 09:31
> Veuillez répondre à
> Michael Werner Maur <michael.maur at vermkv.rlp.de>
> 
> 
> A
> qgis-user <qgis-user at lists.osgeo.org>
> cc
> 
> Objet
> [Qgis-user] wfs usage for "big data"
> 
> 
> 
> 
> 
> 
> 
> 
> Hello,
> 
> we try to connect a wfs in QGIS 2.8 in Ubuntu an as alternativ  in QGIS 
> 2.4 in
> SUSE.
> The wfs has at least 7 million objects and we want to load and cache 
them 
> in
> QGIS. 
> 
> When we check that, QGIS just loads the first delivered object or it 
says, 
> that
> the process crashes.
> 
> Is there any chance to use such big data volumes via wfs ?
> 
> Best Regards
> 
> Michael Maur
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> 
>



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