[MapProxy] Caching styles

[Matt Walker]

Hi Tom,

While testing and reviewing the dimensions PR with Cihan and the team at
ECMWF we discussed handling styles and wondered if they could be handled in
a similar way to dimensions.

The dimensions PR introduces additional hierarchy to the file cache folder
structure based on the dimension name and requested values, it feels as
though this concept could potentially be extended to styles.

Kind regards,

Matt.

Twitter @_walkermatt/ @astuntech
GitHub walkermatt/ astuntechnology


On Wed, 10 Mar 2021, 18:28 Tom Kralidis, <tomkralidis at gmail.com> wrote:

> Hi: (Tom C and I are working together on the below).  More info:
>
> We have a given WMS layer which has, say, 6 styles and are finding that we
> have to setup
> a distinct cache/source/layer definition for each layer/style
> combination.  Users hitting
> MapProxy would submit STYLES=, to which MapProxy would then issue
> STYLES=foo
> (for example) to the upstream WMS given this is configured in MapProxy
> config.
>
> When we configure a layer with NO styles defined in the MapProxy
> configuration, and issue
> a STYLES=foo request, MapProxy throws an exception (the style exists in
> the upstream server).
>
> Are we able to setup a single layer definition which allows for STYLES to
> be passed through?  Or
> do we have to setup a cache/source/layer definition for each layer/style
> combination?  See [1]
> for a sample configuration.
>
> Thanks
>
> ..Tom
>
> [1] https://gist.github.com/tomkralidis/ad89794f1fd0394842fc3cad9e5234f3
>
>
>
>
>
> On Mon, Mar 1, 2021 at 10:58 AM Rahkonen Jukka (MML) <
> jukka.rahkonen at maanmittauslaitos.fi> wrote:
>
>> Hi,
>>
>>
>>
>> The GetMap request looks correct to me. Does it give an error also if you
>> send it with a browser? If it does, and if that style is really advertised
>> for that layer in the GetCapabilities then it feels like a server side
>> issue.
>>
>>
>>
>> -Jukka Rahkonen-
>>
>>
>>
>> *Lähettäjä:* MapProxy <mapproxy-bounces at lists.osgeo.org> *Puolesta *Cooney,
>> Tom (EC)
>> *Lähetetty:* maanantai 1. maaliskuuta 2021 16.59
>> *Vastaanottaja:* mapproxy at lists.osgeo.org
>> *Aihe:* [MapProxy] Caching styles
>>
>>
>>
>> Hi,
>>
>>
>>
>> We are using MapProxy to cache our WMS server. Many of the layers are
>> available in multiple styles and we wish to cache all available styles. For
>> example the layer GDPS.ETA_TT is available in the following styles:
>>
>>    - TEMPERATURE-LINEAR
>>    - TEMPSUMMER
>>    - TEMPSUMMER-LINEAR
>>    - TEMPWINTER
>>    - TEMPWINTER-LINEAR
>>    - TEMPERATURE
>>
>> When I make a request with the styles parameter blank I receive the
>> expected image. However, whenever I add a style to the request I receive an
>> error saying *StyleNotDefined">unsupported styles: TEMPSUMMER. * A
>> simplified version of the config I am using is below. A sample request with
>> blank style parameter and a sample request with *STYLE=TEMPSUMMER* are
>> also below.
>>
>>
>>
>> How do I setup these styles in the config?
>>
>>
>>
>> Thank you for your time,
>>
>> Tom Cooney
>>
>>
>>
>> caches:
>>   GDPS.ETA_TT_cache:
>>
>>     sources:
>>
>>     - GDPS.ETA_TT_source
>>
>> layers:
>>
>>   name: GDPS.ETA_TT
>>
>>   sources:
>>
>>   - GDPS.ETA_TT_cache
>>
>> sources:
>>
>>   GDPS.ETA__TT_source:
>>
>>     req:
>>
>>       layers: GDPS.ETA_TT
>>
>>       url: https ....
>>
>>       styles: TEMPSUMMER
>>
>>
>>
>> Request with blank styles parameter (returns the image as expected)
>>
>>
>> http://geomet-dev-03.cmc.ec.gc.ca:8000/service?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=-90,-180,90,180&CRS=EPSG:4326&WIDTH=1351&HEIGHT=676&LAYERS=GDPS.ETA_TT&STYLES=&FORMAT=image/png&DPI=96&MAP_RESOLUTION=96&FORMAT_OPTIONS=dpi:96&TRANSPARENT=TRUE&TIME=2021-02-26T00:00:00Z
>>
>>
>>
>> Request with a style (returns *StyleNotDefined* error)
>>
>>
>> http://geomet-dev-03.cmc.ec.gc.ca:8000/service?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=-90,-180,90,180&CRS=EPSG:4326&WIDTH=1351&HEIGHT=676&LAYERS=GDPS.ETA_TT&STYLES=TEMPSUMMER&FORMAT=image/png&DPI=96&MAP_RESOLUTION=96&FORMAT_OPTIONS=dpi:96&TRANSPARENT=T
>>
>>
>>
>>
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>>
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