arango> db.geo2.ensureGeoIndex("location.latitude", "location.longitude");
{ "id" : "87612/1070652", "type" : "geo2", "fields" : ["location.latitude", "location.longitude"], "isNewlyCreated" : true }

arango> for (i = -90;  i <= 90;  i += 10) {
.......>   for (j = -180; j <= 180; j += 10) {
.......>     db.geo2.save({ name : "Name/" + i + "/" + j,
.......>                    location: { latitude : i,
.......>                                longitude : j } });
.......>   }
.......> }

arango> db.geo2.near(0,0).limit(3).toArray();
[{
   "_id" : "48126444:72964588",
   "_rev" : 72964588, 
   "location" : { "latitude" : 0, "longitude" : 0}, 
   "name" : "Name/0/0"
 },
 {
   "_id" : "48126444:73030124",
   "_rev" : 73030124, 
   "location" : { "latitude" : 0, "longitude" : 10}, 
   "name" : "Name/0/10"
 },
 {
   "_id" : "48126444:70539756",
   "_rev" : 70539756,
   "location" : { "latitude" : -10, "longitude" : 0},
   "name" : "Name/-10/0"
 }]