メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.385071428931 43.041397942396, 141.385520033663 43.0418306969966, 141.384584605842 43.0423963322957, 141.384003593145 43.0427476709002, 141.383532837333 43.0423357007294, 141.38304419139 43.041907628272, 141.383716204826 43.0415011407534, 141.38427244591 43.041165159655, 141.384650072356 43.0409369780236, 141.38487266856 43.0411653349718, 141.385071428931 43.041397942396)) ^^http://www.opengis.net/ont/geosparql#wktLiteral