メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.295944280928 42.2975856258052, 143.294911945021 42.2970476627688, 143.293854209684 42.2975575291517, 143.293596423045 42.2976158636941, 143.292460400635 42.2971376242897, 143.292219249836 42.2969407568693, 143.291620703197 42.2958342924674, 143.295919702186 42.2947446361303, 143.295998839578 42.2949066758293, 143.296375991709 42.2956780765457, 143.296415217883 42.2957583255517, 143.296839062045 42.296625380654, 143.297124538976 42.2972092511445, 143.295944280928 42.2975856258052)) ^^http://www.opengis.net/ont/geosparql#wktLiteral