メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.782481706807 38.7756461867819, 139.782488604347 38.7756786230696, 139.781571248699 38.7757545468216, 139.780677935138 38.7759073927104, 139.779708155879 38.776124152193, 139.778094926279 38.7749228553012, 139.777853911942 38.7747258680656, 139.778451432936 38.774584872086, 139.781874398774 38.7739480894658, 139.782481706807 38.7756461867819)) ^^http://www.opengis.net/ont/geosparql#wktLiteral