メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.508520155385 34.6890177593805, 135.508240185715 34.6890243770647, 135.50823830123 34.6890908549078, 135.507549585933 34.6891148356575, 135.507549589264 34.6891142722352, 135.507551000135 34.6888756633035, 135.508506410374 34.6888545896312, 135.508520155385 34.6890177593805)) ^^http://www.opengis.net/ont/geosparql#wktLiteral