メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.03327322241 43.5668219278859, 142.034179343145 43.5668895465854, 142.034019157588 43.5679325259716, 142.033117443495 43.5678579891999, 142.032245869815 43.5677784000825, 142.032270054707 43.5675085354892, 142.03241586528 43.5667468674762, 142.03327322241 43.5668219278859)) ^^http://www.opengis.net/ont/geosparql#wktLiteral