[Tilecache] Transparency issue again

[Simon Mercier]

Hi tobias maybe you can try to turn on transparency in your mapfile, try to
overwrite the default png driver with this

OUTPUTFORMAT
    NAME "png"
    MIMETYPE "image/png"
    DRIVER "GD/PNG"
    EXTENSION "png"
    IMAGEMODE RGBA
    TRANSPARENT ON
    FORMATOPTION          "INTERLACE=OFF"   #for tilecache, metaTile On
END

2010/1/20 Tobias Weiß <tobias.weiss at pik-potsdam.de>

>  Hello Tilecachers,
>
> I am new to this list. I am developing map applications using Google Maps,
> OpenlLayers & MapServer. Now I want to improve performance and installed
> Tilecache that runs fine under mod_python. I can render tiles successfully
> but can´t get them transparent. I have searched through the list but
> couldn´t find a solution to my problem. Don´t know if this maybe derives
> from the fact that I use type=MapServer instead of type=WMS in my
> tilecache.cfg to request a layer. As far as I read the other posts, getting
> transparent tiles works by appending "transparent=true" to the WMS url but
> this doesn´t seem to work with type=MapServer.
>
> Ok, this is my code:
>
> #######
>
> JavaScript:
>
> new OpenLayers.Layer.WMS("name","
> http:/localhost/cgi-bin/tilecache/tilecache.py,
>
>                                 {
>
>                                 maxExtent:new
> OpenLayers.Bounds(-198,-115.542749339137,198,109.146905833277),
>
>                                 maxResolution:156543.0339,
>
>                                 layers:"worldtest",
>
>                                 format: 'image/png',
>
>                                 transparent:true
>
>                                 });
>
> #########
>
> tilecache.cfg
>
> [worldtest]
> layers = country
> spherical_mercator = yes
> extension = png
> mapfile = /mymaps/world_test.map
> transparent = true
> data_extent = -198.0,-115.542749339,198.0,109.146905833
> type = MapServer
> metatile = no
> srs = EPSG:4326
> metabuffer =
> 10,10
> bbox = -198.0,-115.542749339,198.0,109.146905833
> metasize = 5,5
> extent_type=loose
>
> # Some extracts from my world_test.map
>
> WEB
>     LOG world_test.log
>     IMAGEPATH ''
>     IMAGEURL ''
> METADATA
>      WMS_ONLINERESOURCE 'http://?map=world_test.map'
>      WMS_SRS 'EPSG:4326 EPSG:900313'
>      WMS_ACCESSCONSTRAINTS 'none'
>      WMS_TITLE 'WMSTitel'
>      WMS_FEATURE_INFO_MIME_TYPE 'text/html'
>      WMS_ABSTRACT 'WMSmetatext'
> END  #METADATA
>
> This code is working fine, just transparency is missing. A single tiles url
> is e.g the following:
> http://localhost/cgi-bin/tilecache/tilecache.py?MAXEXTENT=left-bottom%3D%28-198%2C-115.542749339137%29%20right-top%3D%28198%2C109.146905833277%29&MAXRESOLUTION=156543.0339&LAYERS=worldtest&FORMAT=image%2Fpng&TRANSPARENT=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A900913&BBOX=-0.003589194267988205,-0.003589194267988205,10018754.166010806,100187
> 54.166010806&WIDTH=256&HEIGHT=256<http://localhost/cgi-bin/tilecache/tilecache.py?MAXEXTENT=left-bottom%3D%28-198%2C-115.542749339137%29%20right-top%3D%28198%2C109.146905833277%29&MAXRESOLUTION=156543.0339&LAYERS=worldtest&FORMAT=image%2Fpng&TRANSPARENT=true&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A900913&BBOX=-0.003589194267988205,-0.003589194267988205,10018754.166010806,10018754.166010806&WIDTH=256&HEIGHT=256>
>
> I read somewhere that MapServer needs to be configured to work as a Web
> Map Service (WMS) provider in order to work with Tilecache. I checked my
> MapServer and as far as I see it supports WMS.
>
> I there something wrong in my tilecache.cfg?
>
> Best,
> Tobias
>
>
>
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>
>
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