メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.188348892674 39.6784885383789, 141.188290276596 39.6786367103584, 141.188146105914 39.6790516462933, 141.188014039874 39.6793590507568, 141.187834344293 39.6795298642797, 141.187688841383 39.6795850936472, 141.187057332162 39.6787808977812, 141.186759135304 39.6788599537992, 141.186457584065 39.6785156923173, 141.187179390046 39.6781683537429, 141.18731855744 39.678073033874, 141.187524603184 39.6778733215602, 141.18767200585 39.6779714986044, 141.187824211421 39.6780696274868, 141.188022609516 39.6782550872565, 141.188348892674 39.6784885383789)) ^^http://www.opengis.net/ont/geosparql#wktLiteral