メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355352333706 43.1143001299172, 141.355261867874 43.11467073797, 141.355168867998 43.1150044057401, 141.354676301414 43.1149469890397, 141.354188361619 43.1148884108371, 141.353374439576 43.1147898088711, 141.353445906962 43.1144260162274, 141.353539320654 43.1140646447858, 141.353633470546 43.1136594678565, 141.353862808773 43.1136912112204, 141.355455508572 43.1139204074975, 141.355352333706 43.1143001299172)) ^^http://www.opengis.net/ont/geosparql#wktLiteral