メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.343062016828 43.0451424911894, 141.342969997204 43.0457975165218, 141.341524360764 43.0456998209173, 141.341557095153 43.0454180585715, 141.341601791969 43.0450337794286, 141.341700497417 43.044355528652, 141.341706929024 43.0442380584667, 141.343147682038 43.0443393701942, 141.343141105717 43.0444603556177, 141.343062016828 43.0451424911894)) ^^http://www.opengis.net/ont/geosparql#wktLiteral