メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.33525906451 43.0499797402427, 141.335213666299 43.0503113331148, 141.335166072349 43.0506616158409, 141.333469543326 43.0505392348187, 141.333475706681 43.0505117852075, 141.333519285301 43.0500969082859, 141.333550894137 43.0499062862422, 141.333581828242 43.049657848497, 141.333614644084 43.0493861470306, 141.335326322071 43.049487126104, 141.335302323331 43.0496629694384, 141.33525906451 43.0499797402427)) ^^http://www.opengis.net/ont/geosparql#wktLiteral