メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.97621770295 43.5466345539835, 144.97675437251 43.5469885607306, 144.977152060367 43.5472532743034, 144.976508397591 43.5477632600881, 144.975551142258 43.5471941638878, 144.975498538618 43.5472368009794, 144.975121649129 43.5469871622613, 144.975842073465 43.5463785933222, 144.97621770295 43.5466345539835)) ^^http://www.opengis.net/ont/geosparql#wktLiteral