メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.060725483861 34.6305815749585, 135.06077897166 34.6310860919243, 135.059528363856 34.6311882111811, 135.059466743727 34.6306882494131, 135.059413972027 34.6302648618204, 135.060678217665 34.6301649163929, 135.060725483861 34.6305815749585)) ^^http://www.opengis.net/ont/geosparql#wktLiteral