メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.419018202673 43.7498759504576, 142.419063044696 43.7502875455144, 142.417387024454 43.7503889452865, 142.415850164062 43.75046438488, 142.415852698744 43.7504866733854, 142.415058556682 43.7505169774213, 142.415005520927 43.7500915391436, 142.414964849574 43.7496168758501, 142.414958333412 43.7495569539431, 142.417276574342 43.749445255838, 142.418956737746 43.7493772886239, 142.419018202673 43.7498759504576)) ^^http://www.opengis.net/ont/geosparql#wktLiteral