メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.414677959611 43.7471340320495, 142.414752863387 43.747637970798, 142.413071933138 43.7477113957368, 142.411449241663 43.7478012408061, 142.410741992108 43.7478427313992, 142.410630047441 43.7468535725207, 142.41134158553 43.7468228350614, 142.412974747984 43.7467367749577, 142.41464321118 43.7466542796169, 142.414677959611 43.7471340320495)) ^^http://www.opengis.net/ont/geosparql#wktLiteral