メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.37286318365 43.0839922013768, 141.373347236504 43.0840539294022, 141.374041891102 43.0841500405566, 141.373780105881 43.0852878574902, 141.373087218058 43.085201674874, 141.372091256664 43.0850725852092, 141.37220054356 43.0845963824681, 141.372354722369 43.083926486255, 141.372468979552 43.0839412872538, 141.37286318365 43.0839922013768)) ^^http://www.opengis.net/ont/geosparql#wktLiteral