MapServer WMS Server does not natively support the filter parameter straight from a KVP style request. You can, however, send a GetMap request with an SLD documet, which can contain a Filter expression. ..Tom
________________________________ From: UMN MapServer Users List on behalf of Jeremy Nix Sent: Tue 04-Sep-07 14:46 To: MAPSERVER-USERS@LISTS.UMN.EDU Subject: [UMN_MAPSERVER-USERS] WMS Server: Filtering Raster/Vector data based on request params Is it possible to submit a GetMap request that performs a filtering mechanism on the fly? In Geoserver, it is possible to pass an additional parameter "FILTER" that accepts an OGC formatted filter string where it is feasible to do commands like "PropertyIsEqualTo". I have a large shapefile that I built using the MosaicIndexBuilder from the Geoserver project. The image files that make up this shapefile are not uniform in size, density, or color model. These images have surrounding borders and legends that will overlap other images. If we were dealing with only a handful of images I would set up the individual files separately as different layers. As it is, we have over 100K images that fit this profile, so we've opted to go with the shapefile solution. As the images have been named using specific naming conventions, we wanted to see if we could pass a request parameter to do something like this: FILTER=<ogc:Filter><ogc:PropertyIsEqualTo><ogc:PropertyName>location</ogc:PropertyName><ogc:Literal>FILENAME</ogc:Literal></ogc:PropertyIsEqualTo></ogc:Filter> Is this possible. If not, does anyone have a suggestion on how I can implement this. I was worried about the negative performance that would most likely be involved with have a map file that consisted of 100K+ layers for all of our image files. Thanks in advance for any help. -- __________________________________ Jeremy Nix Senior Application Developer Southwest Financial Services, Ltd. (513) 621-6699
