メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.824276170413 38.0874613893462, 140.820798867986 38.0871071631081, 140.821370912957 38.0836853293657, 140.821965483614 38.0838505223461, 140.822720664278 38.0841078002343, 140.823369499554 38.0843094552787, 140.824176905322 38.0845253372439, 140.824076450814 38.0847096157415, 140.823959853847 38.0854176094516, 140.824618751739 38.0854874850534, 140.824276170413 38.0874613893462)) ^^http://www.opengis.net/ont/geosparql#wktLiteral