メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.768042952094 43.2052590103023, 141.768024373573 43.2052801723334, 141.767766926745 43.2055591335568, 141.76680382641 43.2050964635888, 141.767106155065 43.2048014469865, 141.767478992168 43.2043973658369, 141.767912154143 43.2046080688356, 141.767896709341 43.2046219677178, 141.768410363886 43.2048716695699, 141.768270823355 43.2049995429936, 141.768042952094 43.2052590103023)) ^^http://www.opengis.net/ont/geosparql#wktLiteral