メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.041215388141 43.7299025281769, 142.042513241723 43.7302978034258, 142.044364293724 43.7309175415053, 142.0435498932 43.7322486259803, 142.042555106501 43.7338646028777, 142.041554889925 43.7355072461523, 142.0384643104 43.7345095731368, 142.036874750542 43.7340313956211, 142.037822106023 43.7323785740467, 142.037846832026 43.7323863022694, 142.038820855627 43.7307394957966, 142.039611138497 43.7294032697503, 142.041215388141 43.7299025281769)) ^^http://www.opengis.net/ont/geosparql#wktLiteral