メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.301978701359 39.5964704131996, 140.303221729457 39.5968429321817, 140.304315064205 39.5973981418426, 140.304722980984 39.5983629154358, 140.304156814366 39.5987042421378, 140.302024744544 39.5982130770149, 140.301052528511 39.5973374034849, 140.301058492235 39.5965579316977, 140.301978701359 39.5964704131996)) ^^http://www.opengis.net/ont/geosparql#wktLiteral