メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.769824674048 43.2076848024153, 141.769524358205 43.2080050113136, 141.768567180943 43.2089670180937, 141.76765295107 43.2084989341487, 141.768226655034 43.2078745148124, 141.768556496906 43.2075295365995, 141.768891133167 43.2071916090458, 141.769824674048 43.2076848024153)) ^^http://www.opengis.net/ont/geosparql#wktLiteral