メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.99353498189 34.9962412366944, 136.992066504942 34.9963828443001, 136.991840026436 34.9947812394368, 136.99183205759 34.9946584061943, 136.993364456513 34.9946712670825, 136.993380047574 34.9948027029288, 136.993439803877 34.9953393637126, 136.99353498189 34.9962412366944)) ^^http://www.opengis.net/ont/geosparql#wktLiteral