メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.374413107234 42.988674697482, 144.374458716082 42.9886917123298, 144.374941363982 42.9888705858355, 144.375800123779 42.9891888848687, 144.376016160387 42.9892032924482, 144.375331296539 42.989721970409, 144.374930409612 42.9900420333139, 144.373844099472 42.9908209251589, 144.373158052109 42.9913508642422, 144.372277911958 42.9907293359396, 144.371651294815 42.9902867218083, 144.371684715506 42.9902613459096, 144.372376583837 42.9897334868706, 144.37334805983 42.9889302999667, 144.373813636387 42.9884525606065, 144.374413107234 42.988674697482)) ^^http://www.opengis.net/ont/geosparql#wktLiteral