メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.548096602746 43.2385352975376, 143.547377816319 43.2385658350783, 143.547374161822 43.2385250150435, 143.547260061305 43.2369614883754, 143.547995638134 43.2369299159406, 143.548092157456 43.2384799984794, 143.548096602746 43.2385352975376)) ^^http://www.opengis.net/ont/geosparql#wktLiteral