メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.878683736425 43.8081070734627, 143.879963121699 43.8081991517493, 143.879928957455 43.8084922222651, 143.879877625041 43.8089322941189, 143.87979948128 43.80960028629, 143.87850493422 43.8095158580437, 143.878328863261 43.8095043929503, 143.877442099472 43.8094465552822, 143.877271477719 43.8094354501481, 143.876486853543 43.8093842720395, 143.876688979498 43.8076955664841, 143.87749562402 43.8077432133697, 143.878721468141 43.8078307067325, 143.878683736425 43.8081070734627)) ^^http://www.opengis.net/ont/geosparql#wktLiteral