メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.05733537914 34.8619064732834, 137.056594692385 34.8622737949574, 137.055828818405 34.8612349819084, 137.055499856722 34.8608100704813, 137.056034636496 34.860555960154, 137.056911049924 34.8617317792587, 137.057123127778 34.8616235810415, 137.05733537914 34.8619064732834)) ^^http://www.opengis.net/ont/geosparql#wktLiteral