メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.267943831258 43.1094846595842, 141.26859655839 43.1100568868288, 141.268164021359 43.1103277439096, 141.267776482465 43.1105695880268, 141.267344042153 43.1108338317718, 141.26668911595 43.1102432927495, 141.2664622374 43.1103966309528, 141.266457243561 43.1101925659717, 141.266472056808 43.1100405019927, 141.266472565171 43.1094141618009, 141.266486422235 43.1091777666189, 141.266813077863 43.1089913854973, 141.267135383123 43.108794699328, 141.267943831258 43.1094846595842)) ^^http://www.opengis.net/ont/geosparql#wktLiteral