arango> db.geo2.ensureGeoIndex("location.latitude", "location.longitude");
{ "id" : "geo2/1070652", "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" : "geo2/72964588",
    "_key" : "72964588",
    "_rev" : "72964588", 
    "location" : { "latitude" : 0, "longitude" : 0 }, 
    "name" : "Name/0/0"
  },
  {
    "_id" : "geo2/73030124",
    "_key" : "73030124",
    "_rev" : "73030124", 
    "location" : { "latitude" : 0, "longitude" : 10 }, 
    "name" : "Name/0/10"
  },
  {
    "_id" : "geo2/70539756",
    "_key" : "70539756",
    "_rev" : "70539756",
    "location" : { "latitude" : -10, "longitude" : 0 },
    "name" : "Name/-10/0"
  }
]