メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.319739897471 43.0527670033749, 141.319696493204 43.0529419111442, 141.31964930616 43.0530245154271, 141.319547147612 43.0532034464894, 141.319540362747 43.0532145728626, 141.319339757399 43.0535425741963, 141.319290242936 43.0535317632252, 141.319049825353 43.0534803660723, 141.318929981259 43.0534273470216, 141.318774911489 43.0533637040465, 141.318035088052 43.0529037065354, 141.318106848514 43.0525349220098, 141.318983978115 43.05266070703, 141.319358354589 43.0527129831838, 141.3196274605 43.0527506173155, 141.319739897471 43.0527670033749)) ^^http://www.opengis.net/ont/geosparql#wktLiteral