1

I have a map in OL 3.14 with a WMTS in a specific epsg. I add a WMS layer in an other projection and it's ok, OL reproject right. But with a vector Layer (geoJson, in the same projection as WMS), Openlayers don't display my feauture.

For my local projection, I use proj4.

My code :

var projectionL = ol.proj.get('EPSG:2154');
var projectionCC = ol.proj.get('EPSG:3946');

var ortho2013Extend= [1372000.0,5207000.0,1403020.0000000002 , 5238000.0];
//11 niveau de tuilage
var matrixIds = new Array(11);
//donc 11 niveaux resolution à gérer
var resolutions = new Array(11);

var size = ol.extent.getWidth(ortho2013Extend) / 302;
for (var z = 0; z < 11; ++z) {
  // generate resolutions and matrixIds arrays for this WMTS
  resolutions[z] = size / Math.pow(2, z);
  matrixIds[z] = z;
}
var ortho2013=new ol.layer.Tile({
  opacity: 0.7,
  extent:ortho2013Extend,
  source: new ol.source.WMTS({
    url: 'https://sigar.agglo-larochelle.fr/CeramikServer/rest/wmts/cdalr/ortho2013?',
    layer: 'ortho2013',
    matrixSet: projectionCC,
    format: 'image/jpeg',
    transparente:true,
    projection: projectionCC,
    tileGrid: new ol.tilegrid.WMTS({
      origin: ol.extent.getTopLeft(ortho2013Extend),
      resolutions: resolutions,
      matrixIds: matrixIds,
      tileSize:302
    }),
    style: 'default'
  })
})
var feuxSonoresLayer = new ol.layer.Vector({
   source: new ol.source.Vector({
        url: 'feux_sonores_cc46.geojson',
        format: new ol.format.GeoJSON(),
        projection:projectionL
    })
});
map = new ol.Map({
    layers:[ortho2013, pluLayer, wmsHotSpotWifi, feuxSonoresLayer],
    target: 'map',
    //aucun controle
    //controls:[],
    view: new ol.View({
        projection: projectionCC,
        center: [1377000,5227000],
        extent: ortho2013Extend,
        zoom:14
    })
});

I have found some examples but in old version (3.8) and it used ol.source.GeoJSON, but this source doesn't exist now.

How to do ?

  • Are you receiving an error? Do logs give you any clues as to what might be happening? – MaryBeth Mar 4 '16 at 14:17
  • I assume the GeoJSON is going to change so you can't just project it to the CRS of the Map? – Sethinacan Mar 4 '16 at 14:35
2

You need to correct your vector layer definition (the solution has been tested).

In below definition, you use a projection option that does not exist in the current ol.source.Vector API.

var feuxSonoresLayer = new ol.layer.Vector({ source: new ol.source.Vector({ url: 'feux_sonores_cc46.geojson', format: new ol.format.GeoJSON(), projection:projectionL }) }); Replace it with:

var feuxSonoresLayer = new ol.layer.Vector({ source: new ol.source.Vector({ url: 'feux_sonores_cc46.geojson', format: new ol.format.GeoJSON({ defaultDataProjection: projectionCC }) }) });

GeoJSON recommended data projection is EPSG 4326. OpenLayers 3 implicitly uses it. The simplest choice is to use GeoJSON with EPSG:4326 projection coordinates.

Otherwise, if you choose to keep using a local projection for your GeoJSON (deduced from your file name feux_sonores_cc46.geojson, CC46 = EPSG:3946), you need to specify it explicitly with option defaultDataProjection available within ol.format.GeoJSON

You can also replace projectionCC variable with 'EPSG:3946'. As long as the projection is already loaded, using 'EPSG:3946' instead will make an implicit call to ol.proj.get('EPSG:3946') behind the scene.

|improve this answer|||||
  • Thanks for your answer. I'll try this monday and I keep yourself update – jeff missou Mar 5 '16 at 16:34

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.