WFS is meant to query raw feature data. Scale dependent rendering must be controlled within the renderer itself - in this case using minResolution/maxResolution options as described in http://openlayers.org/en/v3.0.0/apidoc/ol.layer.Layer.html.
> -----Ursprüngliche Nachricht----- > Von: [email protected] [mailto:mapserver-users- > [email protected]] Im Auftrag von Lime, Steve D (MNIT) > Gesendet: Dienstag, 2. Dezember 2014 00:25 > An: [email protected]; [email protected] > Betreff: Re: [mapserver-users] maxscale (denom) with gml ? > > WFS runs through the MapServer query pipeline. Queries are generally scale > independent except for cases where you are interacting with a source map > (e.g. clicking on things), I mean, a scale computation requires both a map > extent and a resulting image size. From that you can compute a cellsize > and scale. I don't know if it's possible to force a scale computation > somehow by passing a map size (in pixels) along with a map extent. or > perhaps by passing the desired scale value directly (map.scaledenom?). > Anyone have other ideas? > > I believe the query functions do respect min/maxscale (denom) values if > the map scale is not set to -1. > > Steve > > ________________________________________ > From: [email protected] [mapserver-users- > [email protected]] on behalf of [email protected] > [[email protected]] > Sent: Monday, December 01, 2014 4:05 PM > To: [email protected] > Subject: Re: [mapserver-users] maxscale (denom) with gml ? > > from the ol3 extract of my last post (below), it's WFS as I see: > > format: new ol.format.WFS({ > ... > > regards > > > > > On 12/01/2014 10:12 PM, Lime, Steve D (MNIT) wrote: > > I meant what so the calls to MapServer from OpenLayers look like? Are > you > using WFS, custom MapServer queries or perhaps OGR output formats? Doesn't > look > like the latter from your mapfile. > > > > Steve > > > > -----Original Message----- > > From: [email protected] > [mailto:[email protected]] On Behalf Of > [email protected] > > Sent: Monday, December 01, 2014 3:06 PM > > To: [email protected] > > Subject: Re: [mapserver-users] maxscale (denom) with gml ? > > > > > > > > Many thanks for investigating; > > please check below the relevant parts of the mapfile, as well as the > openlayers related code; (the purpose is to display nooa gfs winds > forecasts, > "vents" means "winds" in french); > > > > some stuff like the SYMBOL part and the layer's STYLE part should not be > necessary anymore with gml output, as well as few other directives, clean > up job > ahead..., but working, minus the maxscale (denom) directive which is not > working > in this configuration; > > > > I could manage the scale display control on the openlayers 3 side with > an if > case based on the zoom level, but I would prefer mapserver mapfile to > drive it; > > > > Thanks again > > Blaise > > > > > > - - - - - - - - - - > > --- mapfile --- > > (called rg_noaa_vents_gml.map, called on the ol3 side) > > > > MAP > > NAME rg_noaa > > STATUS ON > > SIZE 600 600 > > > > EXTENT -180 -90 180 90 > > > > FONTSET "fonts/fonts.list" > > UNITS DD > > SHAPEPATH "data" > > IMAGECOLOR 230 230 255 > > TEMPLATEPATTERN "rg_noaa" > > IMAGETYPE PNG24 > > OUTPUTFORMAT > > > > # image mapfile # > > #TRANSPARENT ON > > #IMAGEMODE RGB > > #DRIVER GD/PNG > > > > # gml mapfile # > > NAME "gml" > > DRIVER "TEMPLATE" > > FORMATOPTION "FILE=rg_noaa_vent_gml.map" > > > > END > > PROJECTION > > "init=epsg:4326" > > END > > > > WEB > > HEADER templates/header_ol.html > > TEMPLATE "set in index.html" > > FOOTER templates/footer.html > > MAXSCALE 200000000 > > IMAGEPATH "/tmp/ms_tmp/" > > IMAGEURL "/ms_tmp/" > > METADATA > > "WMS_TITLE" "vrrroum_noaa" > > > > "WMS_ONLINERESOURCE" > > > "http://localhost/cgi- > bin/mapserv?map=/var/www/html/rg/blabla_02/noaa/rg_noaa_vents_gml.map" > > > > "WMS_SRS" "EPSG:4326" > > "WMS_ENABLE_REQUEST" "*" > > #"WMS_FEATURE_INFO_MIME_TYPE" "text/html" > > "wms_feature_info_mime_type" "text/gml" > > > > "WFS_ONLINERESOURCE" > > > "http://ip-adress/cgi- > bin/mapserv?map=/var/www/rg/blabla_02/noaa/rg_noaa_vents_gml.map&" > > > > "WFS_ENABLE_REQUEST" "*" > > "wfs_feature_info_mime_type" "text/gml" > > > > END > > END > > > > SYMBOL > > NAME "arrowfilled" > > TYPE vector > > FILLED true > > #FILLED false > > POINTS > > 1 0 > > -1 0 > > -1 7 > > -3 7 > > 0 10 > > 3 7 > > 1 7 > > 1 0 > > -1 0 > > END # POINTS > > END # SYMBOL > > > > > > LAYER ##### ##### ##### fv_168 > > NAME fv_168 > > GROUP v_168 > > TYPE POINT > > STATUS ON > > DATA fv_168 > > MAXSCALEDENOM 20000000 > > SIZEUNITS kilometers > > > > METADATA > > "WMS_TITLE" "v_168" > > "WMS_SRS" "epsg:4326" > > "wms_include_items" "all" > > "gml_include_items" "all" > > "WMS_ENABLE_REQUEST" "*" > > > > "wfs_title" "v_168" > > "wfs:srs" "EPSG:4326" > > "gml_include_items" "all" > > "gml_featureid" "ID" > > "wfs_enable_request" "*" > > END > > > > CLASS > > TEMPLATE "templates/vents.html" > > STYLE > > OPACITY 50 > > SYMBOL "arrowfilled" > > SIZE [VITREP] > > ANGLE [ANGLE] > > WIDTH 2 > > COLOR 100 100 150 > > END > > END > > DUMP TRUE > > HEADER "templates/vents_header_ol.html" > > FOOTER "templates/vents_footer_ol.html" > > TOLERANCE 20 > > END > > > > END # Map File > > > > > > > > > > - - - - - - - - - - - - - - > > --- openlayers 3 --- > > (extracts of the layer description) > > > > var gmlSourceV_168 = new ol.source.ServerVector({ > > layer: 'v_168gml', > > format: new ol.format.WFS({ > > featureNS: "http://mapserver.gis.umn.edu/mapserver";, > > featureType: 'fv_168' > > }), > > projection: 'EPSG:4326', > > loader: function(extent, resolution, projection) { > > $.ajax({ > > url: > > > 'http://ip-adress/cgi- > bin/mapserv?map=/var/www/html/rg/blabla_02/noaa/rg_noaa_vents_gml.map&serv > ice=WFS&' > > + > > > > 'version=1.1.0&request=GetFeature&typename=fv_168&outputFormat=text/xml; > > subtype=gml/3.1.1&' + > > '&srsname=EPSG:4326&bbox=' + extent.join(',') > > }).done( > > function(response) { > > > > gmlSourceV_168.addFeatures(gmlSourceV_168.readFeatures(response)); > > }); > > }, > > strategy: ol.loadingstrategy.bbox > > }); > > > > var gmlLayerV_168 = new ol.layer.Vector({ > > title: '168gml', > > type: 'base', > > visible: false, > > source: gmlSourceV_168, > > style: (function() { > > function ruleStyle(vitrep, angle, lon, lat) { > > var ruleStyle = [new ol.style.Style({ > > image: new ol.style.Icon({ > > src: 'images/windarrow_42.png', > > rotation: angle * 3.141592654 / 180 > > }), > > })]; > > return ruleStyle; > > } > > return function(feature, resolution) { > > var vitrep = feature.get('VITREP'); > > var angle = - feature.get('ANGLE'); > > var lon = feature.getX; > > var lat = feature.Y; > > return ruleStyle(vitrep, angle, lon, lat); > > }; > > })() > > }); > > > > > > > > > > > > > > > > On 12/01/2014 08:50 PM, Lime, Steve D (MNIT) wrote: > >> How are you triggering the GML production in MapServer? > >> > >> -----Original Message----- > >> From: [email protected] > > [mailto:[email protected]] On Behalf Of > [email protected] > >> Sent: Monday, December 01, 2014 11:01 AM > >> To: [email protected] > >> Subject: [mapserver-users] maxscale (denom) with gml ? > >> > >> Dear list, > >> > >> I have a mapfile that control the display of some numerous data > >> depending on > > the > >> scale: > >> - dezooming max: not displaying the shapes; > >> - at a particular zooming-in level: displaying the shapes; > >> > >> This is done with: > >> MAXSCALE 200000000 > >> in the WEB section of the mapfile > >> > >> and with: > >> MAXSCALEDENOM 20000000 > >> in the layer section of the mapfile > >> > >> This works fine rendering images with a basic cgi mapserver > >> application or in > > an opelayers 3 application. > >> > >> I am now trying to get the same behaviour in an openlayers 3 > >> application but > > rendering the shapes on client side through gml instead of server side > image > rendering. > >> Gml rendering works fine, but it seems that the MAXSCALE (DENOM) > >> directive is > >> omitted: the shapes display is no more turned off when dezooming a lot. > >> > >> Any clue to have this MAXSCALE ( DENOM ) working with gml display ? > >> Thanks in advance > >> _______________________________________________ > >> mapserver-users mailing list > >> [email protected] > >> http://lists.osgeo.org/mailman/listinfo/mapserver-users > >> > >> > > _______________________________________________ > > mapserver-users mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > > > > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
