メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.424483704884 43.8045673244294, 142.425519602253 43.805215999692, 142.424777086536 43.8058694382511, 142.424367326564 43.8062300296911, 142.423295298458 43.8055706578524, 142.422242420044 43.8049066395892, 142.421773546072 43.8046115207193, 142.422915245376 43.8036206321504, 142.422934044017 43.8036326814535, 142.423452348263 43.8039649556309, 142.424483704884 43.8045673244294)) ^^http://www.opengis.net/ont/geosparql#wktLiteral