メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.380090335819 42.9976391222638, 144.380163138463 42.9976554176415, 144.38014341845 42.9977168308089, 144.380929982416 42.9978546419439, 144.380649565588 42.9987220975447, 144.37981033191 42.9985797796749, 144.379123322004 42.9984617679121, 144.379139083131 42.9984132989481, 144.379420081386 42.9975233317417, 144.380090335819 42.9976391222638)) ^^http://www.opengis.net/ont/geosparql#wktLiteral