メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.859998420558 43.3339747751179, 141.86017711625 43.3346721922051, 141.860316266943 43.3351970300109, 141.859388112372 43.3353215910842, 141.859219200092 43.3347966507204, 141.859138899359 43.3345565581863, 141.859023060749 43.3341093700115, 141.858946183492 43.333880261467, 141.859938207656 43.3337495209493, 141.859998420558 43.3339747751179)) ^^http://www.opengis.net/ont/geosparql#wktLiteral