メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.385176088412 43.0727052955115, 141.385603765556 43.0733118814528, 141.386292654184 43.0742890347757, 141.383985602312 43.0751599858296, 141.383187316259 43.0740150357654, 141.382816277332 43.0735081778375, 141.382717021832 43.0733829429484, 141.382472603481 43.0730409101513, 141.383051229984 43.0728467536242, 141.384851943145 43.0722272089555, 141.385176088412 43.0727052955115)) ^^http://www.opengis.net/ont/geosparql#wktLiteral