メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.260943763936 44.0249845936489, 144.260923561187 44.0250038349228, 144.259641953065 44.0245507485249, 144.259919856755 44.0241003834038, 144.261352129659 44.0243696016679, 144.260943763936 44.0249845936489)) ^^http://www.opengis.net/ont/geosparql#wktLiteral