メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.360393674772 43.7891017621426, 142.35985512954 43.7895148024598, 142.359814069925 43.7895462929456, 142.359836564444 43.7895628537638, 142.358833745322 43.7902652014256, 142.358464657023 43.7900037230359, 142.358865439411 43.7897198716683, 142.359454861132 43.7892818379356, 142.360021005532 43.7888594343526, 142.360036334851 43.7888482554388, 142.360393674772 43.7891017621426)) ^^http://www.opengis.net/ont/geosparql#wktLiteral