メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.20780862654 36.6749315906503, 137.207854078169 36.6757967152519, 137.207893765296 36.6763809954652, 137.207831910023 36.6763900996677, 137.207995772455 36.6767667089831, 137.207326539185 36.6767820142277, 137.207281472424 36.6763999406056, 137.207238121312 36.6757335683631, 137.207204163571 36.6749522208536, 137.207201225189 36.6747234749463, 137.207144698296 36.6741572957681, 137.2077491813 36.6741684186542, 137.207780389902 36.674700600845, 137.20780862654 36.6749315906503)) ^^http://www.opengis.net/ont/geosparql#wktLiteral