メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.427942001281 43.7629542333631, 142.427978737267 43.7633779561517, 142.428018360473 43.7638349026056, 142.427362211547 43.763873884836, 142.426948635241 43.7638984452166, 142.425906203194 43.7639603538839, 142.425241356649 43.7639998295004, 142.425128556219 43.7629618666262, 142.425103063342 43.762718941507, 142.425781762409 43.7626812916638, 142.426808721024 43.7626243132414, 142.42790811882 43.7625633103414, 142.427942001281 43.7629542333631)) ^^http://www.opengis.net/ont/geosparql#wktLiteral