メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.907573745719 35.4822106809637, 136.907279747929 35.4821675515103, 136.907023596739 35.4821229521654, 136.906568538071 35.4820572925171, 136.906546174475 35.4813658034736, 136.907479354145 35.481383440492, 136.907522606864 35.4818250805633, 136.907573745719 35.4822106809637)) ^^http://www.opengis.net/ont/geosparql#wktLiteral