メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.316828667826 43.7814474182324, 142.317135418208 43.7817622267159, 142.317450434948 43.7820740411223, 142.31753129103 43.782177489784, 142.316653378952 43.7820700054035, 142.31586035609 43.7819639607716, 142.3150445574 43.7818474272734, 142.315921814748 43.7813729432425, 142.316459775986 43.7810936329444, 142.316828667826 43.7814474182324)) ^^http://www.opengis.net/ont/geosparql#wktLiteral