メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.987859249643 34.9024086317949, 136.987254300605 34.9025508513202, 136.986864026129 34.9008113911673, 136.98773022136 34.9005782840179, 136.987949202269 34.9012471153674, 136.988317605706 34.9022916901768, 136.987859249643 34.9024086317949)) ^^http://www.opengis.net/ont/geosparql#wktLiteral