メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.970421629613 34.8577660311266, 136.970086019454 34.8578670439314, 136.969169993676 34.8584495473091, 136.968757795318 34.8579561454296, 136.968329826788 34.8574235566318, 136.968291212963 34.8573760227599, 136.969062841531 34.8569028772839, 136.968971721464 34.8567757433838, 136.968853095475 34.8566382808094, 136.968763164035 34.8565147402546, 136.968725393778 34.8564624903462, 136.969113390283 34.8562182433702, 136.969160254129 34.8562718468016, 136.970421629613 34.8577660311266)) ^^http://www.opengis.net/ont/geosparql#wktLiteral