メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.428654200859 43.067200317982, 141.429056761769 43.0671878708643, 141.429193785015 43.0695948490921, 141.428804802614 43.0696095028519, 141.428164894969 43.0696299503933, 141.428077709095 43.0683934862831, 141.428022978459 43.0672187175158, 141.428654200859 43.067200317982)) ^^http://www.opengis.net/ont/geosparql#wktLiteral