arango> db.examples.ensureGeoIndex("location");
4545321

arango> db.examples.getIndexes();
[ { "iid" : 4545321, "type" : "geo1", "location" : "location" } ]

arango> db.examples.dropIndex(4545321);
true

arango> db.examples.getIndexes();
[]

arango> db.examples.dropIndex(4545321);
false