メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.057256966097 37.9383151804475, 139.056879285179 37.9383451296291, 139.056842697272 37.9380892171164, 139.056813083689 37.9379926410023, 139.056723367136 37.9379930665964, 139.056710053758 37.9378478413031, 139.056803815354 37.9378473965197, 139.05673720791 37.9374880098263, 139.056569913665 37.9375017562986, 139.056554017683 37.9373558386516, 139.056718432682 37.9373374602163, 139.05667923493 37.9372010867212, 139.057066354233 37.9371805266869, 139.057256966097 37.9383151804475)) ^^http://www.opengis.net/ont/geosparql#wktLiteral