メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.092608296262 37.9097948350468, 139.091781863907 37.9094218101292, 139.090229442234 37.9087507052266, 139.089451886188 37.9084150131396, 139.088632284044 37.9081535797021, 139.089631665084 37.9067021274122, 139.09165807554 37.9075740157223, 139.093538774503 37.9084225327476, 139.093062929682 37.9091123986573, 139.092608296262 37.9097948350468)) ^^http://www.opengis.net/ont/geosparql#wktLiteral