メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.992042868469 35.0009176089252, 136.991439173706 35.0009922232416, 136.990294465901 35.0011219565471, 136.990212770723 35.0005308921366, 136.99007446962 34.9995919108246, 136.990679814155 34.9995724491565, 136.991833251747 34.9994732188414, 136.992042868469 35.0009176089252)) ^^http://www.opengis.net/ont/geosparql#wktLiteral