メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.932224650598 43.5625121155105, 141.9302803594 43.5629981667871, 141.929777445976 43.5619064677113, 141.929773956721 43.5618989343469, 141.929782090362 43.5618968813696, 141.936465678181 43.5602211596593, 141.93698090849 43.5613229245004, 141.933517012053 43.5621890167074, 141.932224650598 43.5625121155105)) ^^http://www.opengis.net/ont/geosparql#wktLiteral