WMTS cadastralwebmap tiles appear 'shifted'

[t.ma...@amenti.ch]

Hi GeoAdmin API team

I am trying to use the 'ch.kantone.cadastralwebmap-farbe' layer as WMTS service in Openlayers EPSG:3857; we registered for wmts service and all other layers are working well, but the cadastralwebmap tiles appear 'shifted'. Do you know the problem? 

let projection = getProjection('EPSG:3857');

let projectionExtent = projection.getExtent();

let size = getWidth(projectionExtent) / 256;

export const cadastralLayer = new TileLayer({

  source: new WMTS({

    url:

      'http://wmts20.geo.admin.ch/1.0.0/ch.kantone.cadastralwebmap-farbe/default/current/3857/{TileMatrix}/{TileCol}/{TileRow}.png',

    crossOrigin: 'anonymous',

    attributions: attributions,

    matrixSet: '3857',

    format: 'image/png',

    resourceType: 'tile',

    requestEncoding: 'REST',

    projection: projection,

    tileGrid: new WMTSTileGrid({

      origin: getTopLeft(projectionExtent),

      resolutions: [...Array(21).keys()].map(key => size / Math.pow(2, key)),

      matrixIds: [...Array(21).keys()]

    })

  }),

  extent: projectionExtent,

  style: 'default',

  wrapX: true,

  visible: true

});

Best regards,

Tõnu 

[David Oesch]

We are working on this issue

https://github.com/geoadmin/mf-geoadmin3/issues/4605

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[Marc Monnerat]

Hello,

Cadastral survey and spherical mercator...

We are only cascading this layer and the original server does not support webmercator.

If you really want to use this layer, the only solution for now is to use a single image from WMS (wms.geo.admin.ch), layername is the same).

In the future, we will probably host this layer ourselves.

Regards,

Marc

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[t.ma...@amenti.ch]

Hello, 

I tried wms.geo.admin.ch for 'ch.kantone.cadastralwebmap-farbe' layer, 

get still the same problem: 

could you help with the right settings? 

export const cadastralLayer = new TileLayer({

  source: new TileWMS({

    url: 'https://wms.geo.admin.ch/',

    crossOrigin: 'anonymous',

    attributions: attributions,

    params: {

      LAYERS: 'ch.kantone.cadastralwebmap-farbe',

      FORMAT: 'image/png',

      TILED: false,

      VERSION: '1.1.1'

    },

    serverType: 'mapserver'

  }),

[Marc Monnerat]

Hello Tönu, 

No, you are using a tiled WMS, so the result should be the same as WMTS. Use a single image WMS. For OL5 it is something like:

var projection = ol.proj.get("EPSG:3857");

const wms = new ol.layer.Image({

  source: new ol.source.ImageWMS({

    url: "https://wms.geo.admin.ch/",

    crossOrigin: "anonymous",

    attributions:

      '© <a href="http://www.geo.admin.ch/internet/geoportal/' +

      'en/home.html">Bund + Kantone</a>',

    params: {

      LAYERS: "ch.kantone.cadastralwebmap-farbe",

      FORMAT: "image/png"

    },

    serverType: "mapserver",

    projection: projection

  })

});

If you are using a projection which is not EPSG:3857 or EPSG:4326, you should configure it manually.

Regards,

Marc

[t.ma...@amenti.ch]

Hello Marc, 

thank you! it's working fine.

Regards,

Tõnu

[t.ma...@amenti.ch]

Hello Marc,

we are using ch.kantone.cadastralwebmap-farbe layer from  https://wms.geo.admin.ch/.

its working fine with external monitor and lower resolution laptops; 

but we are experiencing problem to get the layer with laptops with retina screen (MacBook 13"); the WITH and the HEIGHT are set larger accordingly.

 

Do you know can we control the tile size?

In post from Jan 10 you mention that "in the future, we will probably host this layer ourselves." Do you know is it likely to happen or in which timeframe? Other WMTS layers are working perfectly.

Best regards,

Tõnu 

-------------

Cadastral survey and spherical mercator...

We are only cascading this layer and the original server does not support webmercator.

If you really want to use this layer, the only solution for now is to use a single image from WMS (wms.geo.admin.ch), layername is the same).

In the future, we will probably host this layer ourselves.

-------------

[Marc Monnerat]

Hello Tönu,

You mean, how to control the size of the map? Assign some CSS to your <div> holding the map. 

Regarding my remark, I think I was referring to the fact that we are currently proxying this layer, which is served by a custom WMS server reading directly Interlis files (If I'am correct).

It not very efficient, and there was the idea to migrate this layer to mapserver. Apparently, the geodata are already in our database, "only" the style is missing.

I have not heard of these project since a while, so I guess it is pretty down for now.

Regards,

Marc

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[t.ma...@amenti.ch]

Thank you Marc,

with the first question I meant that we do not get the picture at all, if in our query the WIDTH= is too high (over 4000 by mac laptop retina display) we do not get the picture from server. Might it be that there is size limit?

example

https://wms.geo.admin.ch/?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&LAYERS=ch.kantone.cadastralwebmap-farbe&CRS=EPSG%3A3857&STYLES=&WIDTH=4400&HEIGHT=1193&BBOX=888151.6898596367%2C5961122.591597364%2C891426.5387902298%2C5962547.425577742

probably you have an idea how to solve that?

Best regards,

Tõnu

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