メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.885917502771 43.0168009085777, 142.885722572195 43.0166772244366, 142.885605495167 43.0166072629357, 142.884839102823 43.0161491612612, 142.884777133338 43.0161113854534, 142.884833368859 43.0160625472359, 142.885764479897 43.0152500796504, 142.88636530151 43.01562012716, 142.886726663033 43.0158413476631, 142.886806188319 43.0158899959175, 142.887010332749 43.0160149629791, 142.886512862641 43.0164184610028, 142.88642938176 43.0163674435101, 142.885917502771 43.0168009085777)) ^^http://www.opengis.net/ont/geosparql#wktLiteral