メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.873904846547 35.2750074909991, 136.87389175798 35.2750885870624, 136.873845109452 35.2753777729666, 136.871857834529 35.2753866069056, 136.870603435135 35.2753783647041, 136.870358889198 35.2753812228988, 136.870009998306 35.275367841683, 136.869986397695 35.2747510159689, 136.869982064291 35.2743187467423, 136.87061197891 35.2744375310639, 136.870925666554 35.2744944881004, 136.871821124736 35.2746513718311, 136.873904846547 35.2750074909991)) ^^http://www.opengis.net/ont/geosparql#wktLiteral