メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.959833191791 43.5523423981709, 144.959344857801 43.5521510062217, 144.960062643871 43.551590770814, 144.960018609584 43.5515661146301, 144.960349285103 43.5513036114443, 144.960393132909 43.5513327732054, 144.960793580192 43.5516039119035, 144.959833191791 43.5523423981709)) ^^http://www.opengis.net/ont/geosparql#wktLiteral