メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.986902676353 34.8887364763723, 136.984635032103 34.8890382521295, 136.984372045773 34.8881764349919, 136.98612929976 34.8877548780527, 136.987160086795 34.8875139970886, 136.98757756988 34.8886613446833, 136.986902676353 34.8887364763723)) ^^http://www.opengis.net/ont/geosparql#wktLiteral