メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.387504594986 43.7712676572191, 142.387504214609 43.7712707694009, 142.387455764849 43.7717124684403, 142.387427155434 43.772585886537, 142.385591695612 43.7725188731893, 142.385651923512 43.7717448904653, 142.385692508259 43.7712098316646, 142.385719942379 43.7707268082019, 142.387530238664 43.7707837046118, 142.387504594986 43.7712676572191)) ^^http://www.opengis.net/ont/geosparql#wktLiteral