メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.709659811773 35.3614615913633, 136.709654474504 35.3613857967337, 136.70944701989 35.3582629248891, 136.711141195049 35.3581874697542, 136.712822694259 35.3581178590078, 136.712966856142 35.3602161176042, 136.713043283298 35.3613037123898, 136.711364214662 35.3613889793326, 136.709659811773 35.3614615913633)) ^^http://www.opengis.net/ont/geosparql#wktLiteral