Hi, Try this live example. The sql parameter is feeding a subquery into DATA and the next link selects OpenStreetMap primary highways which do not have maxpeed tag. Change primary into secondary and you will see a different map.
http://hip.latuviitta.org/cgi-bin/ms_ows?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&WIDTH=563&HEIGHT=437&LAYERS=sea,borders,osm_viivat&TRANSPARENT=TRUE&FORMAT=image/png&BBOX=-369151.98300283286,6597900.0,1511076.628895184,8057331.444759207&SRS=EPSG:3067&STYLES=&sql=(tags @> 'highway=>primary') AND not (tags ? 'maxspeed') <http://hip.latuviitta.org/cgi-bin/ms_ows?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&WIDTH=563&HEIGHT=437&LAYERS=sea,borders,osm_viivat&TRANSPARENT=TRUE&FORMAT=image/png&BBOX=-369151.98300283286,6597900.0,1511076.628895184,8057331.444759207&SRS=EPSG:3067&STYLES=&sql=%28tags%20@%3E%20%27highway=%3Eprimary%27%29%20AND%20not%20%28tags%20?%20%27maxspeed%27%29%20> -Jukka Rahkonen- ________________________________ Andrea Peri wrote: Hi, thx for response. I see the example. Its pretty interesting. Also another option I found in the documentation: http://mapserver.org/cgi/runsub.html I see in the MS6.2 should be possible to act on DATA and DATAPATTERN. I guess this could be a good choice, but no other information on this and how to use. Is this runtime substitution for DATA and DATAPATTERN really available ? Thx, 2013/6/18 Kralidis,Tom [Ontario] <[email protected]<mailto:[email protected]>> Andrea: you can do something like use runtime substitution (neat example at http://linfiniti.com/2011/09/making-the-most-of-umn-mapserver-runtime-variable-substitution/), or MapScript WxS wrappers (http://mapserver.org/ogc/mapscript.html#python-examples). From: [email protected]<mailto:[email protected]> [mailto:[email protected]<mailto:[email protected]>] On Behalf Of Andrea Peri Sent: June 18, 2013 2:27 PM To: [email protected]<mailto:[email protected]> Subject: [mapserver-users] Select the dataset at runtime Hi, Is possible to change at runtime the datasource of a layer using a parameter of the request to choose the dataset ? I'm explain better. I have two datasource of the same physical phenomenon. The first is at 96dpi and the second at 300dpi. I like to show the first when the user see it on a webgis and ask it using a request getmap with the extra parameter map_resolution=96 Instead the mapserver should return the second dataset when the request has an extra_parameter map_resolution=300 tipically when the user call it for a print at high resolution. I'm trying to avoid to set two distinct mapserver layers. To avoid the user should change the layer in the request. The solution I'm searching is to allow the use of the parameter "map_resolution" to choose the dataset to use. -- ----------------- Andrea Peri . . . . . . . . . qwerty àèìòù ----------------- -- ----------------- Andrea Peri . . . . . . . . . qwerty àèìòù ----------------- _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
