メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.376257594845 42.9855944192778, 144.377263540866 42.9857711390382, 144.377080490255 42.9863347085285, 144.376078505678 42.9861676166694, 144.375352070017 42.9860464495514, 144.375539230817 42.9854682522661, 144.376257594845 42.9855944192778)) ^^http://www.opengis.net/ont/geosparql#wktLiteral