メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.002447193418 43.5654214337365, 145.001608216251 43.5648749494122, 145.001692934999 43.5648071605861, 145.002302155839 43.5643188869976, 145.002430469332 43.5643673741948, 145.003042115668 43.5645984339468, 145.003310865139 43.5647109692499, 145.002536444495 43.5653470662116, 145.002447193418 43.5654214337365)) ^^http://www.opengis.net/ont/geosparql#wktLiteral