メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.957730530389 43.5483401537194, 144.95746776169 43.5481590529166, 144.957593472864 43.5480475721518, 144.958178095035 43.547566870807, 144.958453758363 43.5477379956711, 144.957730530389 43.5483401537194)) ^^http://www.opengis.net/ont/geosparql#wktLiteral