メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.347857820259 43.0242795954775, 141.345712671828 43.024141764474, 141.34576617255 43.023709795506, 141.345767044565 43.0237026284559, 141.345867172303 43.0228953218853, 141.345896969087 43.0227002495216, 141.348073500675 43.0228123711247, 141.348064771053 43.0228455694744, 141.348054333021 43.0228448534473, 141.347857820259 43.0242795954775)) ^^http://www.opengis.net/ont/geosparql#wktLiteral