メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.00635447525 35.7864330229395, 137.006151649874 35.7855520514227, 137.006730387084 35.7854636019515, 137.006933207184 35.7863445552786, 137.00635447525 35.7864330229395)) ^^http://www.opengis.net/ont/geosparql#wktLiteral