检查OpenLayers 3中的点是否在多边形内

Question

When I draw a polygon in an OpenLayers map, I want to know if the marker is inside the polygon or not. I searched in the OpenLayers API, but didn't find a solution.

And you can see my full code in this link .

I have the impression that I have to modify this function:

  function addInteraction() {
    var value = typeSelect.value;
    if (value !== 'None') {
    draw = new ol.interaction.Draw({
      source: vectorSource,
      type: /** @type {ol.geom.GeometryType} */ (typeSelect.value)
    });
    map.addInteraction(draw);
    draw.on('drawend',function(e){
      //Here
    });
  }
}

How can I do this?

Answer 1

You have a method ' intersectsCoordinate ' for the ol.geom.Polygon.

So the code for that will look like:

var polygonGeometry = e.feature.getGeometry();
var coords = iconFeature.getGeometry().getCoordinates();
polygonGeometry.intersectsCoordinate(coords)

Answer 2

You can use the JSTS library, which implements simple geometry processing such as intersects , difference , etc. It contains an OL3 parser that allows the conversion of geometry from OL3 to JSTS and vice-versa.

See an example in OL3 . Basically, you would use a process that checks if the geometry of your marker is within your polygon or not and do what you want from there.