メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.370394972676 43.0457701748029, 141.370800967427 43.0457771623103, 141.370919769068 43.0465033188616, 141.370946996419 43.0468129102045, 141.369690126934 43.0469347679203, 141.369152658486 43.0469074233391, 141.369219921528 43.0466295049637, 141.369424932235 43.0457511122929, 141.370011806518 43.0457626582901, 141.370394972676 43.0457701748029)) ^^http://www.opengis.net/ont/geosparql#wktLiteral