メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.269214288109 44.0222192858154, 144.267611752476 44.0220895322635, 144.267619193159 44.022050334459, 144.267731885196 44.0214487770891, 144.26934166664 44.0216029473916, 144.269339846774 44.0216125292386, 144.269214288109 44.0222192858154)) ^^http://www.opengis.net/ont/geosparql#wktLiteral