メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.366859815474 43.0813936752929, 141.366817630571 43.0814515113967, 141.366767793243 43.0816410851993, 141.366017025079 43.081526772993, 141.366020462889 43.0814945892035, 141.365865692844 43.0814751782958, 141.365916054517 43.0812759749621, 141.36502287039 43.0811443104009, 141.365171678906 43.0805652489156, 141.36608870922 43.0806861245393, 141.366585069175 43.0807570492184, 141.366892746745 43.0807917035909, 141.367366674145 43.080861467942, 141.366859815474 43.0813936752929)) ^^http://www.opengis.net/ont/geosparql#wktLiteral