メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.403613628582 44.1717200997862, 142.402474321415 44.1715246444361, 142.402480399922 44.1715047722366, 142.402738398906 44.1706612290979, 142.403453728351 44.170770409177, 142.403508004598 44.1711102101736, 142.403579953835 44.1714654773368, 142.40359456526 44.1715376364444, 142.403613628582 44.1717200997862)) ^^http://www.opengis.net/ont/geosparql#wktLiteral