メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.398947414586 44.1708684739644, 142.397038607482 44.1705712809165, 142.397285093715 44.1698214421717, 142.399177962312 44.170112060439, 142.398947414586 44.1708684739644)) ^^http://www.opengis.net/ont/geosparql#wktLiteral