メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.264945063642 44.0194285766644, 144.263364783331 44.019262904644, 144.263483822508 44.0186693068744, 144.265051962019 44.0188337001524, 144.265064088773 44.0188349800331, 144.264945063642 44.0194285766644)) ^^http://www.opengis.net/ont/geosparql#wktLiteral