メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.747470450241 35.4061856599193, 136.747475899251 35.4063958854796, 136.745098401142 35.4064168545006, 136.745099632519 35.4061801036019, 136.745100828356 35.4059501832949, 136.746179835529 35.4059409794609, 136.747457846632 35.4059536500692, 136.747470450241 35.4061856599193)) ^^http://www.opengis.net/ont/geosparql#wktLiteral