メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348259382616 43.1168801767504, 141.348186234862 43.1172254571451, 141.348001536885 43.1180855483141, 141.347580891107 43.1180322506648, 141.347213427153 43.117985628238, 141.3471287633 43.117974895109, 141.346823158062 43.1179361522547, 141.346424360237 43.1178856241333, 141.346459490576 43.1176778112906, 141.346536452722 43.1173414231232, 141.346608949093 43.1170343247965, 141.346682277314 43.1166773738124, 141.348259382616 43.1168801767504)) ^^http://www.opengis.net/ont/geosparql#wktLiteral