メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.335253092063 43.7550024315586, 142.335302419027 43.7550155618486, 142.335778824423 43.7551609748482, 142.3351355161 43.7562703549195, 142.334616276445 43.7561164978193, 142.333921787581 43.7559091669313, 142.334527576455 43.7547941620929, 142.335253092063 43.7550024315586)) ^^http://www.opengis.net/ont/geosparql#wktLiteral