How to do clustering of polygons on the map?

[Andrew Foxis]

Good afternoon. How to do clustering of polygons on the map? I'm new(
On example:

Wanted result:

Questions:

1. Can this be implemented? Those show an example please

2 How always show a polygons grid? And not when you hover

3. Possible to use geojson polygons?

4. Thank you!!!

[Pat Keller]

This can probably be done. I haven't looked at the marker cluster code at all but you could probably add an option to show the polygons instead of the circles. I'd be interested in using this feature as well if someone gets to working on it before I can.