It's possible to add a filter with mergeNewParams. http://gis.ibbeck.de/ginfo/apps/OLExamples/OL26examples/wfs_filter_without_e ncoding_26.html But in this case the bbox will not be used and the request returns a response for features outside the view. Mit freundlichen Grüssen Arnd Wippermann http://gis.ibbeck.de/ginfo/