メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.37105224327 43.0701887407359, 141.370660512086 43.0699240364818, 141.369541869888 43.0691749389136, 141.369555406516 43.0691741284156, 141.369568100396 43.0691719755117, 141.369766646294 43.0690529579047, 141.370652838907 43.0691324898765, 141.370626859249 43.0693190852749, 141.371230074463 43.0693981972724, 141.37105224327 43.0701887407359)) ^^http://www.opengis.net/ont/geosparql#wktLiteral