メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.402276151295 44.1728728922305, 142.402732386029 44.1729478937326, 142.402608340356 44.1734129385659, 142.402322331221 44.1744852412222, 142.401698737152 44.1743868857391, 142.400105266567 44.1741255587478, 142.400216296976 44.1736875347422, 142.400370244975 44.1731322550861, 142.400541241814 44.1725876040901, 142.401385773854 44.1727264763338, 142.402276151295 44.1728728922305)) ^^http://www.opengis.net/ont/geosparql#wktLiteral