[mapserver-users] UNION raster layers returns blank image

[Tamas Szekeres]

Hi,

The union layer approach is working only for the vector based layers at the
moment.

Best regards,

Tamas



2011/10/3 Travis Kirstine <traviskirstine at gmail.com>

> Hi All,
>
> I have been having some issues using the UNION option in the mapfile.
> I'm trying to set up a WMS server with several "source" raster layers
> and provide them all as a single union layer to the client.   I don't
> want the source layers visible in the GetCapabilities, only the union
> layer so I have been using a combination of the own_enable_request and
> CONNECTIONTYPE UNION.  It seems to work in the GetCapabilites, only
> the union layer appears however only blank images are returned from
> the GetMap requests.  The layers portion of my mapfile is below, I
> have set the "ows_enable_request" "*" in the WEB METADATA.  Any help
> would be much appreciated
>
>
>    # York Region 2009 - Union
>    LAYER
>        NAME "0937york_union"
>        TYPE RASTER
>        CONNECTIONTYPE UNION
>        CONNECTION
>
> "0937york_1km_mstif,0937york_5km_mstif,0937york_10km_mstif,0937york_overall_mstif"
>        METADATA
>            "wms_title" "York Region UNION"
>            "wms_extent" "594999 4842001 649999 4918001"
>        END
>        CLASS
>        END
>        PROJECTION
>            "init=epsg:26917"
>        END
>    END
>    # York Region 2009 - 15cm
>    LAYER
>        NAME "0937york_1km_mstif"
>        TYPE RASTER
>        TILEINDEX /var/local/data/0937YORK_1km_mstif/york_1km_mstindex
>        TILEITEM location
>        MAXSCALEDENOM 7500
>        OFFSITE 0 0 0
>        METADATA
>            "ows_enable_request" "* !GetCapabilities"
>        END
>        PROJECTION
>            "init=epsg:26917"
>        END
>    END
>    LAYER
>        NAME "0937york_5km_mstif"
>        TYPE RASTER
>        TILEINDEX /var/local/data/0937YORK_5km_mstif/york_5km_mstindex
>        TILEITEM location
>        MINSCALEDENOM 7500
>        MAXSCALEDENOM 40000
>        OFFSITE 0 0 0
>        METADATA
>            "ows_enable_request" "* !GetCapabilities"
>        END
>        PROJECTION
>            "init=epsg:26917"
>        END
>    END
>    LAYER
>        NAME "0937york_10km_mstif"
>        TYPE RASTER
>        TILEINDEX /var/local/data/0937YORK_10km_mstif/york_10km_mstindex
>        TILEITEM location
>        MINSCALEDENOM 40000
>        MAXSCALEDENOM 400000
>        OFFSITE 0 0 0
>        METADATA
>            "ows_enable_request" "* !GetCapabilities"
>        END
>        PROJECTION
>            "init=epsg:26917"
>        END
>    END
>    LAYER
>        NAME "0937york_overall_mstif"
>        TYPE RASTER
>        DATA
> /var/local/data/0937YORK_overall_mstif/0937YORK_100m_overall.tif
>        MINSCALEDENOM 400000
>        OFFSITE 0 0 0
>        METADATA
>            "ows_enable_request" "* !GetCapabilities"
>        END
>        PROJECTION
>            "init=epsg:26917"
>        END
>    END
>
>
> Regards
> _______________________________________________
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> mapserver-users at lists.osgeo.org
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>
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