Multiple feature queries to WFS?
Bart van den Eijnden (OSGIS)
bartvde at OSGIS.NL
Sat Sep 23 03:27:16 EDT 2006
you can get multiple by combining the PropertyIsEqualTo's with the <Or> tag.
Also, what datastore are you using? Remember that shapefiles have no
attribute indexes, so access on an attribute will be slow and requires
parsing of the whole shapefile normally. This kind of use case might be
better of in PostGIS.
The limit is usually the limit of the web server, Apache's limit is
somewhere around 8000 characters (HTTP GET).
Jeff Dege schreef:
> I have a number of features for which I need bounding boxes.
> I've configured a mapserver installation to provide a WFS that I can
> query to get these boxes, and that's working fine. I send the URL, with
> a filter included, and I get back a bunch of XML I can parse to find the
> bounding box.
> Problem is that doing it for the bunch of them is rather slow.
> Would it be possible to include more than one feature in each request?
> My query is:
> <PropertyIsEqualTo matchCase='false'>
> (Minus the formatting that I added to make it readable of course.)
> Can I include multiple matches in a filter?
> Is there a limit to how large my filterXML can get?
Bart van den Eijnden
OSGIS, Open Source GIS
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