メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.387812657341 43.7470872289747, 142.387845239555 43.7470675171211, 142.390318682309 43.7469225556935, 142.390361233792 43.7474214873816, 142.39040217364 43.7478066770054, 142.387865547707 43.7479355415345, 142.387868057098 43.7479608893804, 142.385952685959 43.7485072579157, 142.385917346239 43.7482223222097, 142.38589976011 43.7481133614858, 142.385860602435 43.7476955048267, 142.385855395354 43.7476344714448, 142.385791746152 43.7469500195088, 142.38714444619 43.7464958304522, 142.387812657341 43.7470872289747)) ^^http://www.opengis.net/ont/geosparql#wktLiteral