メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.829764054311 35.2083859963773, 136.829785098763 35.2082709808999, 136.831784174688 35.2084207558868, 136.831778191104 35.2085722227346, 136.829822844925 35.2084084137392, 136.829764054311 35.2083859963773)) ^^http://www.opengis.net/ont/geosparql#wktLiteral