メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.876307706153 43.0093830534773, 142.876284416255 43.009368762799, 142.876107507618 43.0092601562193, 142.875308931004 43.0088160931159, 142.876291250936 43.0079577753604, 142.877031140103 43.008407778915, 142.877256011653 43.0085445352731, 142.876307706153 43.0093830534773)) ^^http://www.opengis.net/ont/geosparql#wktLiteral