メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.919943633023 43.5560954229418, 141.919158835461 43.5562909779302, 141.918536335446 43.5564431864308, 141.917939441728 43.5565983489675, 141.917893987276 43.5566170643987, 141.917213673647 43.5567878387025, 141.916539852225 43.5569555681088, 141.91590009131 43.5571314456919, 141.915238845742 43.5573099300875, 141.91470705461 43.5561731937903, 141.914907922257 43.5561157298815, 141.915341476007 43.5560085237675, 141.916471594348 43.5557232835784, 141.916670241949 43.5556689398015, 141.917420940281 43.5554804400539, 141.917991753852 43.555331357562, 141.918409232257 43.5552174819506, 141.91861416062 43.5551677589544, 141.919309426756 43.5549901261045, 141.919520520677 43.5552933784261, 141.919943633023 43.5560954229418)) ^^http://www.opengis.net/ont/geosparql#wktLiteral