メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.712731890271 35.4364205492986, 136.710920827266 35.4364125078515, 136.709797314265 35.4364074948027, 136.70980985648 35.4355813038223, 136.709947852893 35.4353481357019, 136.712460826953 35.4335627678692, 136.712700862292 35.4337261981363, 136.712764548662 35.4338073852802, 136.712765213087 35.4340567805468, 136.712731890271 35.4364205492986)) ^^http://www.opengis.net/ont/geosparql#wktLiteral