メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.155879677061 34.9358893240482, 137.155752935094 34.9356055367267, 137.155424205893 34.9349495617674, 137.156861203852 34.9347229859061, 137.156871324863 34.9347729935581, 137.156926554447 34.9349711269481, 137.157152443757 34.9352642900961, 137.155879677061 34.9358893240482)) ^^http://www.opengis.net/ont/geosparql#wktLiteral