メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.336938792888 43.0952419653392, 141.336909984494 43.0953788056013, 141.336828290286 43.0956453297549, 141.335558134703 43.0954787648223, 141.335642313946 43.0950778639098, 141.335710294637 43.0948174891841, 141.335747910706 43.0946821969382, 141.337041711571 43.0948580908104, 141.336980195491 43.0950713275978, 141.336938792888 43.0952419653392)) ^^http://www.opengis.net/ont/geosparql#wktLiteral