arango> db.geo.ensureGeoIndex("loc");
{ "id" : "127629/47772301", "type" : "geo1", "geoJson" : false, "fields" : ["loc"], "isNewlyCreated" : true }

arango> for (i = -90;  i <= 90;  i += 10) {
.......>   for (j = -180; j <= 180; j += 10) {
.......>     db.geo.save({ name : "Name/" + i + "/" + j,
.......>                   loc: [ i, j ] });
.......>   }
.......> }

arango> db.geo.count();
703

arango> db.geo.near(0,0).limit(3).toArray();
[ { "_id" : "154092/24861164", "_rev" : "24861164", "name" : "Name/0/0", "loc" : [0, 0]},
  { "_id" : "154092/24926700", "_rev" : "24926700", "name" : "Name/0/10", "loc" : [0, 10]},
  { "_id" : "154092/22436332", "_rev" : "22436332", "name" : "Name/-10/0", "loc" : [-10, 0]}]

arango> db.geo.near(0,0).count();
100