メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.33510665106 43.7523840872817, 142.335212436135 43.752412751247, 142.335492863928 43.7525007562386, 142.334879456596 43.7535645799297, 142.334463294793 43.7534464372153, 142.334452874752 43.7534433513692, 142.334089466004 43.7533357520435, 142.334712056791 43.7522696393581, 142.334892481171 43.7523250040007, 142.33510665106 43.7523840872817)) ^^http://www.opengis.net/ont/geosparql#wktLiteral