メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.393384484789 34.9747640638955, 138.393038633181 34.9752523429869, 138.393004214722 34.9753057472534, 138.392963302906 34.9752911819647, 138.392371776086 34.9750645269532, 138.390095116711 34.9741737246437, 138.39030382975 34.973559755594, 138.390421768748 34.9736011168408, 138.390917066317 34.97377428272, 138.391418106478 34.9739460093112, 138.391786357827 34.9740720195659, 138.392535798737 34.9743284147065, 138.393322198566 34.9747306676285, 138.393384484789 34.9747640638955)) ^^http://www.opengis.net/ont/geosparql#wktLiteral