topic Re: HitTest Question in ArcGIS JavaScript Maps SDK Questions

HitTest Question

AndrewMurdoch1 — Thu, 22 Apr 2021 18:17:17 GMT

Good Day

I have a map with a mix of points and polygons:

If I zoom out and try to select a polygon near the point, the point will almost always be included in the Hit Test, to spite not overlapping the polygon. In this case I was trying to select the area pointed to by the red arrow.

If I look at the hit test I see two elements, are obviously the point and the polygon:

My question is, how do I query the correct object? It has the screen point, which I assume has to be the tip of the mouse pointer, so is there away to correlate that again the objects returned from the Hit Test?

This is core part of the Hit Function:

clickHandler() {
  this._view.on('click', (event) => {

    console.clear();
    console.log('Click Event');
    console.log(event);

    this._view.hitTest(event).then((response) => {

      console.log('Hit Test Result');
      console.log(response);
    });
  });
}

Thanks

Re: HitTest Question

ReneRubalcava — Thu, 22 Apr 2021 19:51:35 GMT

You could search by geometry type if that's what you're looking for.

// by geometry const result = results.find(a => a.graphic.geometry.type === "polygon"); // by layer type, vector tiles are included in hitTest // so this will rule that result out const result = results.find(a => a.graphic.layer.type === "2d");

Re: HitTest Question

AndrewMurdoch1 — Thu, 22 Apr 2021 21:19:07 GMT

Thanks for the suggestion, I can play around with that idea and see where I can take it.