メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.46461242711 43.774608731728, 142.461353988323 43.7747657732025, 142.459346273573 43.774862187093, 142.459145770706 43.7728069590981, 142.461175632401 43.7727146932023, 142.464396420897 43.7725415025303, 142.4645880192 43.7743521430935, 142.46461242711 43.774608731728)) ^^http://www.opengis.net/ont/geosparql#wktLiteral