メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.172260212194 37.7393597861205, 139.17225194841 37.7393919333256, 139.17202286634 37.7400685880936, 139.171857879083 37.7405701637691, 139.170952164663 37.7406381108388, 139.168815546313 37.740813415049, 139.168656709296 37.7397917908011, 139.168524993091 37.7387104581232, 139.17070156515 37.7385580170466, 139.172567593265 37.7384374344057, 139.172437622406 37.7388015432349, 139.172260212194 37.7393597861205)) ^^http://www.opengis.net/ont/geosparql#wktLiteral