メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.266503253102 43.1113377664944, 141.26644013395 43.1113950340717, 141.266446917505 43.1110968297723, 141.2664622374 43.1103966309528, 141.26668911595 43.1102432927495, 141.267344042153 43.1108338317718, 141.266898264442 43.1110914896885, 141.266503253102 43.1113377664944)) ^^http://www.opengis.net/ont/geosparql#wktLiteral