<?php
...
  
collect(json_decode(Storage::get('/data/clusters.json')))
	->filter(function ($cluster) {
	    return isset($cluster->properties);
	})
	->map(function ($cluster) use ($zoomLevel) {
	    return [
	        'lat' => $cluster->geometry->coordinates[1],
	        'lon' => $cluster->geometry->coordinates[0],
	        'zoom' => $zoomLevel
	    ];
	})
	->chunk(1000)
	->each(function ($chunk) {
	    Cluster::insert($chunk->toArray());
	});