Multiple google markers on the same place - google-maps

Question

i'm trying to use google maps with markers. i do not have any problems with the placement of markers in the map, but how can i get the markers to split like google earth when i have to markers in the same place? like this : Example
Thanks !

Answer 1

I didn't understand what you're trying to accomplish, but ...
Did you already check a marker clustering algorithm like this one or the google semi-official ?

Answer 2

//Here is my attempt... a Archimedes spiraling out of the markers:
// calc a spiraling out position based on marker count at that location
// this function is very tweeky
function spiral_coords(lat_long, i) {
i = (i == 1)? 0: i+1;
var r = i * 0.002;
// .8 is a fudge number to adjust to real appearance on the map
return [lat_long[0] + (r * .8 * Math.sin(.5 * (i + 2))), lat_long[1] + (r * Math.cos(.5 * (i + 2)))];
}
// this is from a fusion table query... but your source could be anything
// I take the coords and check against a hash count of them and calc out the spiral position
function data_handler(d) {
var map = $("#map")[0];
map.markers = [];
var rows = d.rows;
var fields = d.columns;
var index = {};
for (var i in fields) {
index[fields[i]] = i;
}
var location_count = {};
for (var i in rows) {
var row = rows[i];
var location = row[index["Location"]];
var lat_long = location.split(" ");
lat_long[0] = parseFloat(lat_long[0]);
lat_long[1] = parseFloat(lat_long[1]);
// here are the active ingredients
if(!(location in location_count)) {
location_count[location] = 0;
}
location_count[location]++;
lat_long = spiral_coords(lat_long, location_count[location]);
var marker = new google.maps.Marker({
position: new google.maps.LatLng(lat_long[0], lat_long[1]),
map: map.map
});
}
}