メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.361765954404 43.7456255143661, 142.362099895855 43.7457227928143, 142.362376008535 43.7458032322158, 142.362428879392 43.7458644301377, 142.361174511488 43.7464082960554, 142.360863461928 43.7460336107318, 142.360459399215 43.7455453394194, 142.360136802827 43.7451695904517, 142.360113134117 43.745143138282, 142.360691167735 43.7453139857781, 142.361347474427 43.7455065537678, 142.361765954404 43.7456255143661)) ^^http://www.opengis.net/ont/geosparql#wktLiteral