メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.384224446171 43.7634839208501, 142.384296858294 43.7634591185165, 142.384547974819 43.7639905828475, 142.383066862346 43.76431117348, 142.382825204513 43.7638993134241, 142.382784675077 43.7638471810648, 142.382477348629 43.7632774529069, 142.383955690982 43.7628515476372, 142.383959686052 43.7629017696855, 142.383963183608 43.7629527673133, 142.384224446171 43.7634839208501)) ^^http://www.opengis.net/ont/geosparql#wktLiteral