メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.645542498919 42.8248678022265, 141.644988372729 42.8253033286073, 141.644441798309 42.8257327037392, 141.644086771001 42.8260128587693, 141.643724567707 42.8262986012435, 141.643385496913 42.8265781354503, 141.642437100497 42.8259361665738, 141.642798444784 42.8256409988053, 141.643138221755 42.8253720201758, 141.643476468012 42.8250931852992, 141.644020167182 42.8246647852993, 141.644519193167 42.8242262990653, 141.645542498919 42.8248678022265)) ^^http://www.opengis.net/ont/geosparql#wktLiteral