get the EPSG code from openlayers 3 layer

Question

This is my OSM layer in openlayers 3.9.0.

var layer = new ol.layer.Tile({
    source: new ol.source.OSM(

        {
        attributions: [
          new ol.Attribution({
            html: 'All maps &copy; ' +
                '<a href="http://www.opencyclemap.org/">OpenCycleMap</a>'
          })
        ]
      }             

    ),
    opacity: 0.8,
    brightness: 0.8
});

And now I want to get the EPSG code of the layer to check it so I do like

var a = layer.getProjection().getCode();
alert(a);

and I get the error layer.getProjection is not a function.

What am I missing?

Please help me

score 9 · Accepted Answer · answered Sep 24 '15 at 16:43

9

You should getProjection on ol.source.OSM rather than ol.layer.Tile, so:

layer.getSource().getProjection().getCode()

answered Sep 24 '15 at 16:43

Jonatas Walker

13,583
5
53
82

It worked. Out of curiosity, I just cannot understand why I need the `getSource`, since I get the projection of the layer with `getProjection`. Any help? Thanks – user2860857 Sep 24 '15 at 16:48
1

Because `ol.layer.Tile` knows nothing about projection. – Jonatas Walker Sep 24 '15 at 17:03

get the EPSG code from openlayers 3 layer

1 Answers1