javascript - Check if a point is inside polygon in OpenLayers 3 - Stack Overflow

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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?

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?

• javascript
• openlayers-3

Share Improve this question Follow edited Jan 10, 2017 at 10:08 ahocevar 5,6481818 silver badges3232 bronze badges asked Jan 3, 2017 at 15:02 Abdelmoghite KacimiAbdelmoghite Kacimi 18311 gold badge22 silver badges88 bronze badges

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2 Answers 2

Sorted by: Reset to default 24

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

So the code for that will look like:

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

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.

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