mjaakko

//Converts a bounding box bounded by minLat and maxLat and minLng and maxLng to a list of geohashes (e.g. ["60;24/19/84", "60;24/19/85"]) used for MQTT topic filters
function bbox2geohashes(minLat, minLng, maxLat, maxLng) {
	var deltaLat = maxLat - minLat;
	var deltaLng = maxLng - minLng;

	var geohashLevel = Math.max(Math.ceil(Math.abs(Math.log10(deltaLat))), Math.ceil(Math.abs(Math.log10(deltaLng))));
	var delta = Math.pow(10, -geohashLevel);

	var geohashes = [];