メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.748642004909 42.9073465395711, 140.749754483297 42.9073055032051, 140.749806742517 42.9080347493218, 140.749917586389 42.909141667498, 140.748779752051 42.9091931332391, 140.748149883227 42.9092209451036, 140.746495854751 42.9093037294877, 140.746492557448 42.9092779447211, 140.746295736572 42.9069793972932, 140.746293970845 42.9069575711952, 140.746274441077 42.9068084941832, 140.747498828571 42.906748695222, 140.748579364648 42.9066829865729, 140.748642004909 42.9073465395711)) ^^http://www.opengis.net/ont/geosparql#wktLiteral