メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.341044491666 43.1154264264517, 141.341489967104 43.1159158431334, 141.342030249571 43.1164667011336, 141.342171540381 43.1170447672122, 141.34237260773 43.1176770355196, 141.342120121591 43.117968707863, 141.342089052125 43.1179338619191, 141.341759398201 43.1175634456746, 141.341406128476 43.1171285633608, 141.340687299878 43.1162920288278, 141.340338321151 43.1158922674474, 141.340091487669 43.1156025315298, 141.339845601121 43.1153137869752, 141.340931892288 43.1150634970267, 141.341044491666 43.1154264264517)) ^^http://www.opengis.net/ont/geosparql#wktLiteral