メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.310159628424 43.7790022052396, 142.310451079855 43.7792723689277, 142.310558098584 43.7793662622218, 142.311008976899 43.7798044784306, 142.309248993255 43.7806896923739, 142.308827141482 43.7802972847283, 142.308465517609 43.779917064282, 142.308079823433 43.7795543120822, 142.308836869376 43.7791663168792, 142.309364494391 43.7788812078858, 142.309799504676 43.7786531237453, 142.310159628424 43.7790022052396)) ^^http://www.opengis.net/ont/geosparql#wktLiteral