メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.341928650557 43.7762877527973, 142.341491414836 43.7763094347428, 142.341125489412 43.7763172745703, 142.340856756042 43.7763150666921, 142.340278459871 43.7763025412626, 142.340083303239 43.7764989655263, 142.339597032561 43.7762608595856, 142.339959607727 43.775906518125, 142.339945094737 43.7758274888491, 142.339995710625 43.7757977372589, 142.340756030391 43.775293464595, 142.341323227438 43.7750826026485, 142.342280986198 43.7747209823137, 142.342058832464 43.7756876809467, 142.341928650557 43.7762877527973)) ^^http://www.opengis.net/ont/geosparql#wktLiteral