メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.891427054732 35.2460020416204, 136.890403535965 35.2459961063235, 136.89038752141 35.2457777572463, 136.891460552657 35.245574578396, 136.89142804218 35.2459895790722, 136.891427054732 35.2460020416204)) ^^http://www.opengis.net/ont/geosparql#wktLiteral