メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.578155717818 42.8896593349215, 141.577440162289 42.8902786121808, 141.577143737774 42.8905617085015, 141.576748171873 42.8909769350942, 141.576685124938 42.891066376858, 141.5761165067 42.8909234913714, 141.575702573619 42.8907834136773, 141.575680560058 42.8907758992505, 141.575395663772 42.8906179435316, 141.574959052975 42.8902459894847, 141.57550203033 42.8894074019409, 141.57588534824 42.8888955426384, 141.576288849211 42.8886076646514, 141.576646572777 42.8883734597234, 141.577143700499 42.8880108056701, 141.577689974207 42.8884748270605, 141.578618770589 42.8892638407784, 141.578155717818 42.8896593349215)) ^^http://www.opengis.net/ont/geosparql#wktLiteral