メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.259919856755 44.0241003834038, 144.259641953065 44.0245507485249, 144.258328691266 44.0240831165715, 144.258630295911 44.0236417647759, 144.258675268113 44.0235768028859, 144.259977302987 44.0240182026485, 144.259919856755 44.0241003834038)) ^^http://www.opengis.net/ont/geosparql#wktLiteral