メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.762285000744 43.2038454324326, 141.761990000235 43.2041593160846, 141.761728850641 43.2044113140619, 141.76082315907 43.2039612150692, 141.761073118802 43.2036962309434, 141.761355513621 43.2033960797043, 141.762285000744 43.2038454324326)) ^^http://www.opengis.net/ont/geosparql#wktLiteral