メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.045911848085 42.9170726859546, 143.046648411457 42.9171459898666, 143.046521821372 42.9181270872972, 143.046505301324 42.9181260065746, 143.045780029863 42.9180796298738, 143.044993080267 42.9180293834187, 143.044998988867 42.917986510375, 143.045000284998 42.9179756695841, 143.045118849299 42.9169937867933, 143.045911848085 42.9170726859546)) ^^http://www.opengis.net/ont/geosparql#wktLiteral