メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.746275697426 35.4240190671344, 136.746445440532 35.4242085973894, 136.74318943382 35.4251198996251, 136.743123617814 35.4249148839473, 136.74305885829 35.4247130069787, 136.746142689407 35.4238460717911, 136.746275697426 35.4240190671344)) ^^http://www.opengis.net/ont/geosparql#wktLiteral