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Using a client-side webmapping library (openlayers3 or leaflet), I want my user to be able to add one marker on the map. I will then be able to retrieve long/lat coordinates.

From that, I want to know if it is located inside a polygon (from another layer) and retrieve polygon attributes. Is that possible ?

  • It is possible, for sure, try some online demo and we can help somehow. You can fork a clean map and work on it. – Jonatas Walker May 29 '15 at 11:18
  • Thanks for your answer Jonatas. For now I just wanted to know if that was possible and I would have been happy with a clue. – simo May 29 '15 at 12:21
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Yes that's possible. With leafletjs you can use this Mapbox API: leaflet-pip

Once you have captured the users clicked coordinates you can use them like in the example linked above:

var userCoords = ????
var gjLayer = L.geoJson(statesData);
var results = leafletPip.pointInLayer(userCoords, gjLayer);

This will give you an array of polygons that contain that point, along with all the polygons attributes.

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