メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.178568969984 35.3600827353613, 137.177005734074 35.3598592750644, 137.176736537186 35.3595119030549, 137.177276356656 35.3592189043903, 137.177706845548 35.358968517199, 137.178817736864 35.3596275726682, 137.178568969984 35.3600827353613)) ^^http://www.opengis.net/ont/geosparql#wktLiteral