メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.778891755724 35.420865349419, 136.778120939221 35.4212604005618, 136.778125194334 35.4210904590076, 136.776919509591 35.4211332846308, 136.775746635071 35.4211779651156, 136.775641943076 35.4209542246988, 136.775571242074 35.4208263624259, 136.775609089633 35.4207562068257, 136.778092828503 35.4206729128202, 136.77932131931 35.4206447245232, 136.778891755724 35.420865349419)) ^^http://www.opengis.net/ont/geosparql#wktLiteral