メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.899174155197 34.8770510812409, 136.898988555589 34.8770917398928, 136.898904468933 34.8767528734179, 136.898868875596 34.8765676055119, 136.898830029057 34.87645685613, 136.8987306345 34.8761813528578, 136.899538594613 34.8760247096458, 136.899642127571 34.876415813848, 136.899729499992 34.8764384061354, 136.899764591487 34.8766274768184, 136.899610407386 34.8766984946547, 136.89963674624 34.8767594134861, 136.899174155197 34.8770510812409)) ^^http://www.opengis.net/ont/geosparql#wktLiteral