メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.330777972968 43.7588038892147, 142.330840810581 43.7588198434138, 142.331292609328 43.7589573347614, 142.331628919727 43.7590629284924, 142.331713838471 43.7590899413888, 142.331083663845 43.7601339008334, 142.330696397083 43.760008668829, 142.330253088053 43.7598723818324, 142.330198732446 43.7598551918475, 142.329560073623 43.7596489112825, 142.329973373749 43.7589225761556, 142.330147805891 43.7585963571901, 142.330229673254 43.7586233211585, 142.330777972968 43.7588038892147)) ^^http://www.opengis.net/ont/geosparql#wktLiteral