[MapProxy] Create WMS from PDOK WMTS and create maps below minimum tile scale

[Ron Lindhoudt]

Hi Just,

I need a serverside solution.
From Kadaster I got the information that your solution with Geowebcache WMS is only temporarily available and not up-to-date:

-----------
Onze geowebcache gaat binnenkort uit (als ik me niet vergis per 1 december 2017).
Het genoemde endpoint is geen supported endpoint, dat is de WMS op de Geowebcache ook nooit geweest bij PDOK.
Just heeft hem zelf gevonden waarschijnlijk, mogelijk vanuit de tijd dat hij meer betrokken was bij PDOK. 

De BRT-achtergrondkaart daar is ook niet bijgewerkt, dat levert een oude versie op. 
-----

Met vriendelijke groet,
 
Ron Lindhoudt


-----Oorspronkelijk bericht-----
Van: MapProxy [mailto:mapproxy-bounces at lists.osgeo.org] Namens Just van den Broecke
Verzonden: donderdag 23 november 2017 14:10
Aan: mapproxy at lists.osgeo.org
Onderwerp: Re: [MapProxy] Create WMS from PDOK WMTS and create maps below minimum tile scale

Hi Ron,

This question was asked earlier on this list. MapProxy IMO can currently not blow up tiles. But there are two ways to effect this: client-side or server-side.

Client-side: if you use OpenLayers, you can use "serverResolutions" on the WMTS (TMS) Layer in combination with the property "resolutions" on the Map object. OL will "blow up" tiles below the lowest serverResolution value within the Map resolutions range.
I use this for PDOK:
serverResolutions_0_14: [3440.640, 1720.320, 860.160, 430.080, 215.040, 107.520, 53.760, 26.880, 13.440, 6.720, 3.360, 1.680, 0.840, 0.420, 0.210]
resolutions_0_16: [3440.640, 1720.320, 860.160, 430.080, 215.040, 107.520, 53.760, 26.880, 13.440, 6.720, 3.360, 1.680, 0.840, 0.420, 0.210, 0.105, 0.0525]

Server-side: more complex, haven't tried this, general directives:
- PDOK (GeoWebCache) also supports WMS for that Layer: 
https://geodata.nationaalgeoregister.nl/tiles/service/wms? with additional zoomlevels at least 15 and 16.
- make an MP config that directly fetches tiles for levels 0-14 (PDOK BRTAchtergrondkaart levels, see above) and for levels 15+ use
"use_direct_from_res: 0.21" using the WMS Source. Possibly you need a combined cache (TMS Source for 0-14 and WMS Source for 15+) different grids/subgrids and never store tiles via disable_storage: true.

I do something similar but switch from PDOK BRT to PDOK detailed topo BGT at level 12:
https://kadviewer.map5.nl/?map_visibility_BRT-BGT%20Achtergrond=true
(ignore the ads).

Best,

Just van den Broecke

On 23-11-17 11:27, Ron Lindhoudt wrote:
> Hello,
> 
> I create a WMS from this WMTS using MapProxy: 
> http://geodata.nationaalgeoregister.nl/tiles/service/wmts?LAYER=brtach
> tergrondkaart
> 
> The minimum tile scale is 1:750
> 
> Below that the WMS GetMap request does not show anything in the map.
> 
> How do I get MapProxy to use the tiles from the minimum scale and use 
> that to blow it up for WMS scales below 1:750?
> 
> Met vriendelijke groet,
> 
> 		
> 
> Ron Lindhoudt
> NedGraphics B.V.
> Projectleider Development
> 
> +31 347 329 600
> rli at nedgraphics.nl <mailto:rli at nedgraphics.nl> www.nedgraphics.nl 
> <http://www.nedgraphics.nl/>
> 
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> 4131 PA Vianen
> 
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