メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.568096424042 42.9872618915052, 141.568119906161 42.9872651263177, 141.569259814072 42.9874047617855, 141.569659491457 42.9874610102898, 141.569530014103 42.9879698652225, 141.569412650319 42.9883921440002, 141.569202456572 42.9890878136322, 141.568755462563 42.98902544499, 141.568576110314 42.9890004651176, 141.568007526517 42.9889180996089, 141.567676147922 42.9888660502662, 141.567438972173 42.9888287680373, 141.567077303379 42.988769854861, 141.567349945476 42.987678874518, 141.567494809061 42.9871792566185, 141.568096424042 42.9872618915052)) ^^http://www.opengis.net/ont/geosparql#wktLiteral