メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.630348092246 35.3572868175692, 136.630306846969 35.3572844521653, 136.62919824801 35.3573123423053, 136.629210914999 35.3568144410676, 136.629765929779 35.3568120491223, 136.630341343184 35.3568252385826, 136.630366993163 35.3568265495069, 136.630348092246 35.3572868175692)) ^^http://www.opengis.net/ont/geosparql#wktLiteral