メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.959982736543 43.5510595829032, 144.960349285103 43.5513036114443, 144.960018609584 43.5515661146301, 144.960062643871 43.551590770814, 144.959344857801 43.5521510062217, 144.959254890587 43.5521153789622, 144.958948067665 43.5519053351893, 144.958734636588 43.5517640985338, 144.958524131012 43.5516233897658, 144.95956990527 43.5507923902636, 144.959982736543 43.5510595829032)) ^^http://www.opengis.net/ont/geosparql#wktLiteral