[mapserver-users] WMS GetMap request - incorrect layer ordering

[Rahkonen Jukka]

Hi,

You had only one layer in your WMS request but I suppose it was just an accident. Layers in WMS request should be respected so that the first layer goes to the bottom and next ones above it. Order in the mapfile should not matter. I can't say about your installation but it seems to behave correctly for me with Mapserver 6.0
Compare this one with toilets first in the request
http://188.64.1.61/cgi-bin/mapserv?map=/usr/map/osm-mapserver_i.map&REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&WIDTH=459&HEIGHT=353&LAYERS=POI_toilet%2Cdefault&TRANSPARENT=TRUE&FORMAT=image%2Fpng&BBOX=436293.7193914731,6903411.337404243,436601.3555717845,6903647.929063611&SRS=EPSG:3067&STYLES=
and this with toilets last
http://188.64.1.61/cgi-bin/mapserv?map=/usr/map/osm-mapserver_i.map&REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&WIDTH=459&HEIGHT=353&LAYERS=default%2CPOI_toilet&TRANSPARENT=TRUE&FORMAT=image%2Fpng&BBOX=436293.7193914731,6903411.337404243,436601.3555717845,6903647.929063611&SRS=EPSG:3067&STYLES=

-Jukka Rahkonen-
________________________________________
Lähettäjä: mapserver-users-bounces at lists.osgeo.org [mapserver-users-bounces at lists.osgeo.org] käyttäjän John Cartwright [john.c.cartwright at comcast.net] puolesta
Lähetetty: 15. lokakuuta 2011 19:02
Vastaanottaja: mapserver-users at lists.osgeo.org
Aihe: [mapserver-users] WMS GetMap request - incorrect layer ordering

Hello All,

I'm finding a difference between the image produced by shp2img and a WMS GetMap request.  The image produced by shp2img looks as I expect honoring the order in which LAYERS are defined in the map file and the STATUS value.  However, the WMS request does not seem to respect the order of the LAYERs, always drawing the polygons first regardless of the order defined in the map file or that of the WMS LAYERS request parameter.

Here's a representative WMS request:

http://localhost/cgi-bin/basicworld?request=getmap&service=wms&width=500&height=250&bbox=-180,-90,180,90&srs=EPSG:4326&version=1.1.1&layers=countries&format=png

Both the cities and countries layers display as you'd expect, but the countries draw on top of the cities contrary to what I'd expect and different that in the shp2img output.

I'm using mapserver version 6.0.1 and I've tried various versions of WMS.  Can someone please examine the map file below and point out what I'm doing wrong?

Thanks!

--john


MAP
   NAME basicworld
   SIZE 720 360
   EXTENT -180 -90 180 90
   UNITS DD
   SHAPEPATH "/Users/jcc/shapefiles"
   IMAGETYPE PNG

        WEB
      IMAGEPATH "/Library/WebServer/Documents/output"
      IMAGEURL "/output/"

      METADATA
         "ows_title" "BasicWorld Server"
         "ows_onlineresource" "http://localhost/cgi-bin/basicworld?"   ##required
         "ows_srs" "EPSG:4326"
         "ows_onlineresource"   "http://localhost/cgi-bin/basicworld?"  ## Recommended
        "ows_enable_request" "*"
      END
   END

   PROJECTION
      "init=epsg:4326"   ##required
   END

   SYMBOL
      NAME 'circle'
      TYPE ELLIPSE
      POINTS 1 1 END
      FILLED TRUE
   END

LAYER
        NAME countries
        TYPE POLYGON
        STATUS on
        DATA "country"
        CLASS
                OUTLINECOLOR 0 0 0
                COLOR 167 167 167
        END
END  # layer

LAYER
        NAME cities
        TYPE POINT
        STATUS default
        DATA "cities"
        CLASS
                SYMBOL 'circle'
                SIZE 6
                COLOR 204 153 255
        END
END  # layer

END # Map File_______________________________________________
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