メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.365379063493 43.731568629558, 142.365065660225 43.7321170771262, 142.361503194893 43.7310125641675, 142.3617096687 43.730156083685, 142.361944288672 43.7295175166673, 142.364053528673 43.7301320256219, 142.364382469983 43.7302270868582, 142.365635789055 43.7305892621231, 142.365895774038 43.730664382676, 142.365379063493 43.731568629558)) ^^http://www.opengis.net/ont/geosparql#wktLiteral