メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.524765374476 43.8573487285723, 141.523744957346 43.8574520840859, 141.52312015967 43.8572441773848, 141.523367316289 43.8568941908158, 141.523406052608 43.8568373815753, 141.523753402656 43.8569679663212, 141.523832484291 43.8568498293943, 141.523914979234 43.8567266429345, 141.523935218074 43.8567447031829, 141.524164906759 43.8569493160361, 141.52467738928 43.8569783835066, 141.524765374476 43.8573487285723)) ^^http://www.opengis.net/ont/geosparql#wktLiteral