メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.13484138937 34.6164405639631, 134.134107378042 34.6164168365696, 134.134130910578 34.6162636089607, 134.134056431924 34.6159186401216, 134.134010480962 34.6157510712961, 134.135095802138 34.6158102997708, 134.13484138937 34.6164405639631)) ^^http://www.opengis.net/ont/geosparql#wktLiteral