メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.878430117187 38.0240964009218, 140.878374474789 38.0256375380663, 140.878129278654 38.0278791237076, 140.877795422595 38.0306578079922, 140.874516774887 38.0304447065003, 140.874919546683 38.0278481701818, 140.874212138403 38.0277875935659, 140.872570765332 38.0276731176159, 140.875197474657 38.0260926882, 140.875859955353 38.025717702517, 140.878430117187 38.0240964009218)) ^^http://www.opengis.net/ont/geosparql#wktLiteral