メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.923201409603 43.4975381783463, 141.923313123886 43.4979091562789, 141.923387878012 43.4981572720569, 141.923446854521 43.4983531607783, 141.923505691017 43.4985484864824, 141.923595297077 43.4988459802766, 141.922560085355 43.4987179011567, 141.922079376441 43.4984558903873, 141.921990324198 43.498328483612, 141.922068719611 43.4986608961341, 141.921416880681 43.4987652139164, 141.921204368472 43.4978417401601, 141.921560287408 43.4977923754863, 141.921826887279 43.4979217352582, 141.922098710013 43.4979746282008, 141.922148041971 43.4979142191497, 141.922353417281 43.4976626173044, 141.922536907027 43.4974205156851, 141.922991352095 43.496820980717, 141.923201409603 43.4975381783463)) ^^http://www.opengis.net/ont/geosparql#wktLiteral