I'm using openLayers 3.19.1.

When clicking on the map (map.on("click") event ) I retrieve the pixel I clicked on (event.pixel).

I need to get all features in an X radius on the pixel.

There is a function called "forEachFeatureIntersectingExtent" I can execute on the ol.source.Vector, but it needs an "extent" parameter.

How can i convert my pixel to an extent?

If anyone has another idea for getting all features in a specific radius of a click on the map please share.

1 Answer 1


This function answers my question:

public  generateExtentFromPixel(pixel: ol.Pixel, size = 100): ol.Extent {

   let EXTENT_TL = [];
   EXTENT_TL[0] = pixel[0] - size;
   EXTENT_TL[1] = pixel[1] - size;

   let EXTENT_BR = [];
   EXTENT_BR[0] = pixel[0] + size;
   EXTENT_BR[1] = pixel[1] + size;

   let newExtent: ol.Extent = [EXTENT_TL[0], EXTENT_TL[1], EXTENT_BR[0], EXTENT_BR[1]];

   return newExtent;

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