Hello Steve,
maybe you can use a bounding box instead taking the
<bbox=793732,6570204,793765,6570228> command in the WFS
request somehow (with your own coordinates naturally)? I do not
work with open layers so I do not know how to do it there. It
works quite nicely in Leaflet.
Basically I zoom to where I'm interested in and then fire the
request. I guess one could also do this without zooming in first.
Hope this can be of any help.
Cheers
Lars
Am 26.01.2015 um 16:38 schrieb steve.tout...@inspq.qc.ca:
I understand the objective of
rfc 91,
but the most common use case would be to pass the supplied
geometry.....
If mapserver doesn't use the
supplied
geometry, that means that it doesn't support spatial
filtering.
Our data covers the whole
country, not
using the supplied geometry means we can't use mapserver as a
wfs server....
Is there something we can do
about it?
A workaround we could use?
It’s a limitation
in older
versions of MapServer where specific backend optimizations
were scattered
about the WMS/WFS code. Most of those optimizations address
the most common
use cases – I guess this wasn’t one of them. It’s surprising
that at
worst the extent of the supplied geometry isn’t passed (I see
a comment
in the WFS code about this). The specific filter intersection
test is applied
on the MapServer side – the results are correct, performance
can suffer
though.
This is being
addresses in
MapServer 7.0 where more complete filter translation functions
are being
supported (RFC 91).
Steve
From:
mapserver-users-boun...@lists.osgeo.org
[mailto:mapserver-users-boun...@lists.osgeo.org]
On Behalf Of steve.tout...@inspq.qc.ca
Sent: Monday, January 26, 2015 8:55 AM
To: mapserver-users@lists.osgeo.org
Subject: [mapserver-users] Mapserver doesn't send good
filter to postgis
Sorry my first post was with an
inapprpriate
title......
I'm using mapserver 6.4.1 and postgis 2.1
using OpenLayers 2.13.1 I draw a small polygon that I use for
a within
spatial filter of a WFS getfeature request. The problem is
that mapserver
is not sending this polygon to postgis, it is sending the
extent of the
mapfile as filter...
The wfs POST Request (created and send by OpenLayers client)
<ogc:Filter xmlns:ogc="http://www.opengis.net/ogc"><ogc:Within><ogc:PropertyName>msGeometry</ogc:PropertyName><gml:Polygon
xmlns:gml="http://www.opengis.net/gml"
srsName="urn:ogc:def:crs:EPSG::3857"><gml:exterior><gml:LinearRing><gml:posList>-8081644.2511244
5835062.56996
-8081707.5505384 5834980.1612889 -8081638.2794815
5834913.2788892
-8081533.1785677 5834988.5215889 -8081644.2511244
5835062.56996</gml:posList></gml:LinearRing></gml:exterior></gml:Polygon></ogc:Within></ogc:Filter>
In Mapserver log, I see
FLTLayerApplyPlainFilterToLayer(): ([shape] within
fromText('POLYGON
((-8081644.2511243997141719 5835062.5699599999934435,
-8081707.5505384001880884
5834980.1612889003008604, -8081638.2794815003871918
5834913.2788891997188330,
-8081533.1785677000880241 5834988.5215889001265168,
-8081644.2511243997141719
5835062.5699599999934435))'))
Then a few lines later, I see that it is not sending the
polygon received
as filter
select ....... where geom_p &&
ST_GeomFromText('POLYGON((-9239517
5465442,-9239517 9349764,-5565974 9349764,-5565974
5465442,-9239517 5465442))',3857);
See the polygon definition is different, postgis receive the
extent defined
in the mapfile
EXTENT -9239517 5465442 -5565974 9349764
And, in postgis log I see this query, See the
select ....... where geom_p &&
ST_GeomFromText('POLYGON((-9239517
5465442,-9239517 9349764,-5565974 9349764,-5565974
5465442,-9239517 5465442))',3857);
Why Mapserver is not sending the polygon received as filter to
postgis?
Thanks!
Steve
Toutant,
M. Sc.
Analyste en géomatique
Secteur environnement
Direction de la santé environnementale et de la toxicologie
Institut national de santé publique du Québec
Tél.: 418 646-6777 poste 30015
Téléc.: 418 644-4593
steve.tout...@inspq.qc.ca
http://www.inspq.qc.ca
http://www.monclimatmasante.qc.ca
Pour me rejoindre par
courrier
Service de l'infrastructure et du réseau
Direction des technologies de l'information
Ministère de la Sécurité Publique
2525 boul. Laurier, 2e étage
Tour Laurentides
Québec, G1V 2L2
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