メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.84134401418 38.7184595393133, 139.841308442969 38.7185438342872, 139.840397416159 38.7177640405636, 139.840354858883 38.7177232811789, 139.841056842291 38.7166047040558, 139.8422443568 38.7170278967339, 139.842241964164 38.7170319582878, 139.84134401418 38.7184595393133)) ^^http://www.opengis.net/ont/geosparql#wktLiteral