メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.469907438201 43.0448423940508, 141.470405187729 43.0449680956137, 141.470628549781 43.0450296805674, 141.471045389301 43.0451918923552, 141.471204274118 43.0452566243071, 141.470841587729 43.0457518162023, 141.470529359621 43.0462071922631, 141.470342050204 43.0464560835297, 141.469842619563 43.0471130168052, 141.469289203757 43.0461087073702, 141.468809580787 43.0451998471786, 141.46867357273 43.0449420677209, 141.468409889778 43.0444575829454, 141.46988206056 43.0448360317504, 141.469907438201 43.0448423940508)) ^^http://www.opengis.net/ont/geosparql#wktLiteral