メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.350472015192 44.4813055093583, 142.349634106121 44.4810879249172, 142.349683184508 44.480984768508, 142.349921307121 44.4804921585237, 142.350697817075 44.4806839900876, 142.350505837994 44.4812124208726, 142.350472015192 44.4813055093583)) ^^http://www.opengis.net/ont/geosparql#wktLiteral