メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.328454376112 43.0492588943164, 141.328414300092 43.0495528301098, 141.328384887173 43.0497685742556, 141.327500566493 43.0496318298274, 141.327636923814 43.0491079198415, 141.327693780548 43.0488654599576, 141.327745830725 43.0486429353045, 141.327751872346 43.0486173836223, 141.328535077508 43.0486663846198, 141.328503608238 43.0488978669945, 141.328454376112 43.0492588943164)) ^^http://www.opengis.net/ont/geosparql#wktLiteral