メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.437076157979 43.8192267052777, 142.439181893004 43.8205098012641, 142.436847550921 43.8224252249169, 142.436522445356 43.822186013884, 142.434788777156 43.8211404801866, 142.432708337058 43.8198522996299, 142.432778600391 43.8197914485272, 142.433822058718 43.8188877239743, 142.434986930482 43.8179018219252, 142.437076157979 43.8192267052777)) ^^http://www.opengis.net/ont/geosparql#wktLiteral