question: public OverpassQuery boundingBox ( double southernLat , double westernLon , double northernLat , double easternLon ) { builder . append ( String . format ( Locale . US , "[bbox:%s,%s,%s,%s]" , southernLat , westernLon , northernLat , easternLon ) ) ; return this ; }
target:  Defines a global bounding box that is then implicitly added to all queries (unless they specify a different explicit bounding box)