メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.212710132227 38.4206303648758, 141.213979057946 38.4210582598525, 141.213723646888 38.4215906409054, 141.213497620592 38.4220802720655, 141.212925754446 38.4232722049828, 141.212818536772 38.4235143963624, 141.212754223013 38.4236711419018, 141.211713063174 38.4227568389757, 141.210730635757 38.4218367051547, 141.210919496988 38.4214488352249, 141.211191185506 38.4208332120958, 141.211469905317 38.4202127797631, 141.212710132227 38.4206303648758)) ^^http://www.opengis.net/ont/geosparql#wktLiteral