メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.759815839079 43.2006837593203, 141.759473542716 43.20105193889, 141.759173399979 43.2013598146361, 141.758254541421 43.2009355207243, 141.758577239728 43.2006025656547, 141.75892020379 43.200241354095, 141.759815839079 43.2006837593203)) ^^http://www.opengis.net/ont/geosparql#wktLiteral