メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.332142674977 43.0472688894734, 141.332138414143 43.0473038089993, 141.33208511613 43.0477397067859, 141.331207369026 43.0476779441643, 141.330801853069 43.0476511974879, 141.330409577273 43.0476239922648, 141.330470943828 43.047168749843, 141.330487060865 43.0469757545736, 141.330523934507 43.0467349606501, 141.332194216679 43.0468478176319, 141.332142674977 43.0472688894734)) ^^http://www.opengis.net/ont/geosparql#wktLiteral