メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.179785897673 35.3618819143988, 137.178786435756 35.3613220792261, 137.179009778354 35.3606860740114, 137.17906951888 35.3605531109402, 137.179417312351 35.3607315284807, 137.180336375438 35.3608858727061, 137.180453253617 35.3609297338198, 137.180651239718 35.3610196427555, 137.179785897673 35.3618819143988)) ^^http://www.opengis.net/ont/geosparql#wktLiteral