メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.78364717976 35.4099346947606, 136.781419162114 35.4100153228866, 136.781404601661 35.4098031001006, 136.78137139661 35.4091606915678, 136.783604503991 35.4090898701747, 136.783615502204 35.4095023559008, 136.78364717976 35.4099346947606)) ^^http://www.opengis.net/ont/geosparql#wktLiteral