メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.376205163484 43.7959846664061, 142.375827765999 43.7957205757452, 142.372139866897 43.7930889547626, 142.371655020505 43.7927464829941, 142.373636006501 43.7913032528533, 142.375673886767 43.7899011707149, 142.3758145447 43.7897753702824, 142.376883318649 43.7889476168103, 142.376980939575 43.7890363976359, 142.377674912521 43.789801183872, 142.378310374259 43.7904710075758, 142.378943113526 43.7917013355461, 142.379160681637 43.7921816246258, 142.380155513259 43.7930707064099, 142.380244340687 43.7931500707694, 142.376205163484 43.7959846664061)) ^^http://www.opengis.net/ont/geosparql#wktLiteral