メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.831936557746 34.6808000932163, 135.831450209021 34.6808057629735, 135.831450231273 34.6807947753165, 135.83090165056 34.6808121885559, 135.830925254257 34.680430345023, 135.830961152967 34.6804281408808, 135.830961714873 34.6802202293439, 135.830849165969 34.680218241773, 135.830853280559 34.6800709062644, 135.831945601676 34.6800742437751, 135.831936557746 34.6808000932163)) ^^http://www.opengis.net/ont/geosparql#wktLiteral