メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.327968084722 43.1153220246761, 141.328294014083 43.1156535718446, 141.328632445197 43.1159838819824, 141.329003430456 43.1163457490168, 141.328256959857 43.1167270198785, 141.32744520542 43.1171460880092, 141.327117575237 43.1167934273136, 141.326798608975 43.1164648865895, 141.32645684848 43.1161265971406, 141.326075845755 43.1157425580237, 141.3268624106 43.1153317355111, 141.327571911125 43.1149569970763, 141.32758565577 43.1149495131813, 141.327968084722 43.1153220246761)) ^^http://www.opengis.net/ont/geosparql#wktLiteral