メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.598581060807 43.3029372333697, 144.598462547901 43.3029652656998, 144.59706181377 43.3033227283426, 144.59661666791 43.3022800410486, 144.598024634939 43.3019459229176, 144.598119814391 43.3019220969841, 144.598581060807 43.3029372333697)) ^^http://www.opengis.net/ont/geosparql#wktLiteral