メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.491292398875 40.5083859938782, 141.491249603864 40.5083553493901, 141.491240893733 40.5082751899971, 141.491243939536 40.5082425259196, 141.490916584319 40.508046579054, 141.491202215382 40.5077509183702, 141.490787030608 40.5075046372577, 141.490946085536 40.5073206905483, 141.491529952929 40.5076370706848, 141.49184730873 40.5078097834535, 141.4915976695 40.5080436771901, 141.491292398875 40.5083859938782)) ^^http://www.opengis.net/ont/geosparql#wktLiteral