GeoJson and openlayers

Question

What is the correct way to fetch vector features from the server using GeoJson?

{
  "type" : "FeatureCollection",
  "features" : [ {
    "type" : "Point",
    "coordinates" : {
      "x" : 14.8802,
      "y" : 22.1043,
      "z" : "NaN",
      "m" : "NaN"
    },
    "properties" : {
      "date" : 1472936467273,
      "device" : null,
      "longitude" : 14.8802,
      "latitude" : 22.1043,
      "mi_PRINX" : 1,
      "id" : 1
    }
  }]
}

The map shows no points.

  var dynamicFeatures = new ol.layer.Vector({
          source: new ol.source.Vector({
          format: new ol.format.GeoJSON(),
          url: "http://localhost:9090/map/layers"
        })
      });

      // Map
      this.mapObject = new ol.Map({
        target: 'map',
        controls: [],
        layers: [
          new ol.layer.Tile({
            source: new ol.source.OSM()
          }),
          dynamicFeatures
        ],
        view: new ol.View({
          center: [949282, 6002552],
          zoom: 4
        })
      });

URL is correct.

Could it be because the z and m values? these are generated automatically from the server...

Regards, Ido

Answer 1

Your geoJson should be as below:

{
  "type" : "FeatureCollection",
  "features" : [
{ 
"type" : "Feature",
"geometry":  {
    "type" : "Point",
    "coordinates" : [14.8802, 22.1043]
    },
    "properties" : {
      "date" : 1472936467273,
      "device" : null,
      "longitude" : 14.8802,
      "latitude" : 22.1043,
      "mi_PRINX" : 1,
      "id" : 1
    }
  }
]
}

Reference : http://geojson.org/geojson-spec.html