メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.397876178535 43.0571574832956, 141.39869883988 43.05800643903, 141.399222628571 43.058566713981, 141.398141591578 43.0591103437656, 141.397452946029 43.0594572899742, 141.396727669037 43.0598238620025, 141.396234596633 43.0592904604644, 141.395555990434 43.0585812521719, 141.394320366222 43.0572781603855, 141.394648323929 43.0571225806285, 141.395601572829 43.0566021534399, 141.395731595643 43.0565349741066, 141.395893536465 43.0564482701349, 141.396646692957 43.0560534270921, 141.396721132795 43.056017550709, 141.397363837824 43.0566519338331, 141.397876178535 43.0571574832956)) ^^http://www.opengis.net/ont/geosparql#wktLiteral