メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355644109079 43.0804753567314, 141.354076310677 43.0802689741909, 141.354198526032 43.0797897979355, 141.354279161155 43.0794578452549, 141.354371309657 43.0791191609517, 141.355127702629 43.0792193946724, 141.355935818499 43.0793322661573, 141.355795335465 43.0799270622309, 141.355644109079 43.0804753567314)) ^^http://www.opengis.net/ont/geosparql#wktLiteral