メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.169293701898 42.8843165726193, 143.168888005737 42.8839555687795, 143.169299160977 42.8837110327672, 143.169685859543 42.8834877915681, 143.170074502811 42.883254053425, 143.17107699182 42.8826632997374, 143.171502298068 42.8829602771131, 143.170978711907 42.8832771116907, 143.169293701898 42.8843165726193)) ^^http://www.opengis.net/ont/geosparql#wktLiteral