メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.934754690929 42.945944669447, 142.934061708633 42.9463031370024, 142.934011463639 42.9462571592361, 142.933049913135 42.9453556207638, 142.933673395835 42.9449721152373, 142.934420124966 42.9456367887375, 142.93465796818 42.9458556456789, 142.934754690929 42.945944669447)) ^^http://www.opengis.net/ont/geosparql#wktLiteral