メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355944524802 43.0728564846305, 141.355913460108 43.0729938058386, 141.355806347448 43.0734063653835, 141.355336789954 43.0733443181458, 141.355028039356 43.0733006185543, 141.353929456662 43.0731521980551, 141.353937829958 43.0731240616703, 141.354266596042 43.0719978496388, 141.355322727243 43.0721482550379, 141.356101372723 43.07225618251, 141.355944524802 43.0728564846305)) ^^http://www.opengis.net/ont/geosparql#wktLiteral