> db.tiles.find({ position: { $within: { $box: [ [ 1466, -2128 ], [ 1506, -2088 ] ] } } }).explain()
{
	"cursor" : "GeoBrowse-box",
	"nscanned" : 341,
	"nscannedObjects" : 341,
	"n" : 341,
	"millis" : 657,
	"indexBounds" : {

	}
}
> db.tiles.find({ position: { $within: { $box: [ [ -1953, -412 ], [ -1913, -372 ] ] } } }).explain();
{
	"cursor" : "GeoBrowse-box",
	"nscanned" : 24,
	"nscannedObjects" : 24,
	"n" : 24,
	"millis" : 4555,
	"indexBounds" : {

	}
}