メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348993212084 43.1267690897029, 141.349390477558 43.1271777088972, 141.34894415089 43.1274165498444, 141.347795907108 43.128030841357, 141.347355019296 43.1276438096702, 141.346940732881 43.1272767502118, 141.346910525589 43.1272481004361, 141.34859588699 43.1263649703552, 141.348993212084 43.1267690897029)) ^^http://www.opengis.net/ont/geosparql#wktLiteral