メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.378569231839 43.7624813851361, 142.378882599046 43.7630132822754, 142.377342756165 43.7634645581571, 142.377045740568 43.7629288064421, 142.377039054932 43.7629164551967, 142.376754716495 43.7623908493797, 142.377414195692 43.7622072865826, 142.377933206743 43.7620594069956, 142.378267100594 43.7619661575228, 142.378569231839 43.7624813851361)) ^^http://www.opengis.net/ont/geosparql#wktLiteral