メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.258187612751 43.1370110670698, 141.257550995221 43.1374510151078, 141.257121989854 43.1377549146042, 141.257079121131 43.1377868946902, 141.256137349542 43.137108086064, 141.256114091653 43.1370913567615, 141.254994834348 43.1362845483411, 141.25503811399 43.1362509549303, 141.255465181491 43.1359303080407, 141.255986872947 43.1363188948806, 141.256604685899 43.1358659232798, 141.258187612751 43.1370110670698)) ^^http://www.opengis.net/ont/geosparql#wktLiteral