メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.323587506573 43.2157003101666, 141.322404801123 43.2147281334623, 141.331691123447 43.212688595772, 141.334678170053 43.2120340114328, 141.335114085999 43.2131815400317, 141.333014707399 43.2136223549373, 141.325406563134 43.2152574082743, 141.323869633067 43.21559218054, 141.323587506573 43.2157003101666)) ^^http://www.opengis.net/ont/geosparql#wktLiteral