メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.739707389363 35.4088443033366, 136.739694255841 35.4088881995531, 136.73775547868 35.4083981842483, 136.737761397917 35.4076776603549, 136.738876562906 35.407739987479, 136.739807291005 35.4077913014014, 136.739793335784 35.408048569993, 136.739707389363 35.4088443033366)) ^^http://www.opengis.net/ont/geosparql#wktLiteral