[MapProxy] opacity not working?

[Michael Shishcu]

MArco, you can check the png file properties, "Bit depth" for ex. you
should have 32 bits per pixel for full feature png (RGBA) and 8 for
quantized

regards, michael

On Tue, Jan 3, 2012 at 5:23 PM, DeDuikertjes <DeDuikertjes at xs4all.nl> wrote:

>  Michael,
>
> Thanks for your prompt response.
>
> The WMS-service is not under my control.
> It's an ArcGIS10 server (the one serving the layer which doesn't like te
> be opaque).
> Probably the image is quantised, but that's what we want as we are aiming
> on mobile use.
>
> Is there a way to see if the image is quantised?
> Why is there a problem? Can it be mitigated?
>
> MArco
>
> Op 3-1-2012 16:15, Michael Shishcu schreef:
>
> Hi,
>
> Do you have quantisation for the outputformat at the mapserver side? if
> so, this can be the problem.
>
> regards, michael
>
> On Tue, Jan 3, 2012 at 5:08 PM, DeDuikertjes <DeDuikertjes at xs4all.nl>wrote:
>
>>  List,
>>
>> I've the mapproxy config to my liking. Everything is working fine except
>> for the opacity on a source.
>>
>> I would expect a layer pointing to a cache pointing to a source with
>> definition:
>>   wms_Bedrijventerrein:
>>     concurrent_requests: 4
>>     image: {opacity: 0.1}
>>     req: { layers: Bedrijventerrein, transparent: true, url: '
>> http://myservice.nl/MapServer/WMSServer'}
>>     seed_only: false
>>     supported_srs: ['EPSG:28992']
>>     type: wms
>>     wms_opts: {featureinfo: true}
>> to be rendered almost transparent when requested and/ or merged on top of
>> other layers.
>> The result is unfortunately fully opaque.
>>
>> Can anyone point me to what I am doing wrong.
>>
>> I've isolated the problem and tested it in the configuration attached
>> below.
>>
>> Any help greatly appreciated,
>> MArco
>>
>> caches:
>>   _Bedrijventerrein:
>>     grids: [applas_grid]
>>     link_single_color_images: true
>>     sources: [wms_Bedrijventerrein]
>>   _lufo:
>>     cache: {directory_layout: tc, type: file}
>>     grids: [applas_grid]
>>     link_single_color_images: true
>>     meta_buffer: 0
>>     meta_size: [4, 4]
>>     minimize_meta_requests: true
>>     sources: [lufo_wms]
>>     format: image/png
>>     image:
>>       mode: RGBA
>> globals:
>>   cache:
>>     base_dir: /var/applas_user_data/prod/cache/
>>     lock_dir: /var/applas_user_data/prod/cache/locks/
>>     meta_buffer: 255
>>     meta_size: [3, 3]
>>     minimize_meta_requests: true
>>   image:
>>     formats:
>>       image/png:
>>         encoding_options: {quantizer: fastoctree}
>>         mode: P
>>         transparent: true
>> grids:
>>   applas_grid:
>>     bbox: [-285401.91999999998, 22598.080000000002, 595401.92000000004,
>> 903401.92000000004]
>>     res: [3440.6399999999999, 1720.3199999999999, 860.15999999999997,
>> 430.07999999999998,
>>       215.03999999999999, 107.52, 53.759999999999998, 26.879999999999999,
>> 13.44, 6.7199999999999998,
>>       3.3599999999999999, 1.6799999999999999, 0.83999999999999997,
>> 0.41999999999999998,
>>       0.20999999999999999]
>>     srs: EPSG:28992
>>     tile_size: [256, 256]
>> layers:
>> - name: lufo
>>   sources: [_lufo]
>>   title: Luchtfoto
>> - name: Bedrijventerrein
>>   sources: [_Bedrijventerrein]
>>   title: Bedrijventerrein
>> services:
>>   tms: null
>>   wms:
>>     image_formats: ['image/png']
>>     md:
>>       abstract: Tiled WMS
>>       access_constraints: None
>>       contact: {address: mystreet 1, city: Utrecht, country: The
>> Netherlands, email: nope at spam.org,
>>         organization: nope, person: nope, phone: nope,
>>         position: Technical Director, postcode: nope}
>>       fees: None
>>       online_resource: http://myservice.nl/
>>       title: tile service.
>>     srs: ['EPSG:28992', 'EPSG:900913', 'EPSG:4326']
>> sources:
>>   lufo_wms:
>>     concurrent_requests: 4
>>     req: {layers: ipo_luchtfoto_actueel, url: '
>> http://myservice.nl/mapserv.cgi?map=luchtfoto.map'}
>>     supported_srs: ['EPSG:28992']
>>     type: wms
>>   wms_Bedrijventerrein:
>>     concurrent_requests: 4
>>     image: {opacity: 0.1}
>>     req: { layers: Bedrijventerrein, transparent: true, url: '
>> http://myservice.nl/MapServer/WMSServer'}
>>     seed_only: false
>>     supported_srs: ['EPSG:28992']
>>     type: wms
>>     wms_opts: {featureinfo: true}
>>
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>>
>>
>
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