メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.047862545453 42.9031879718674, 143.048721474033 42.9032520403546, 143.049341288679 42.9032982886441, 143.049224287069 42.9042530334745, 143.048489740015 42.9042018873712, 143.04775525513 42.9041518614234, 143.047168128895 42.9041148724339, 143.047188288531 42.903957115653, 143.046975761949 42.9039425574076, 143.047005263874 42.9037746076962, 143.047209577557 42.9037902772418, 143.047291953541 42.9031453819775, 143.047814711679 42.9031843662071, 143.047862545453 42.9031879718674)) ^^http://www.opengis.net/ont/geosparql#wktLiteral