メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.353882609303 43.1070711900166, 141.353778033936 43.1074623770191, 141.352564180924 43.1073019127997, 141.352367881576 43.1072766796662, 141.352043925308 43.1072317419753, 141.352041383753 43.1072218056211, 141.352240805573 43.1064494119711, 141.352758275346 43.1065128101731, 141.353988818696 43.1066731943379, 141.353882609303 43.1070711900166)) ^^http://www.opengis.net/ont/geosparql#wktLiteral