メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.295998839578 42.2949066758293, 143.295919702186 42.2947446361303, 143.291620703197 42.2958342924674, 143.290518863573 42.2936652209698, 143.29684802896 42.2918981820192, 143.298044836874 42.2942188214004, 143.29809518764 42.294312895567, 143.297530345732 42.2944729349443, 143.297016323981 42.2946184403892, 143.296514089985 42.294760741584, 143.295998839578 42.2949066758293)) ^^http://www.opengis.net/ont/geosparql#wktLiteral