メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((129.081960337408 32.9857165479668, 129.081894450848 32.9856487826433, 129.081776045642 32.9852138422283, 129.082531317339 32.9850619633067, 129.082671475929 32.9855734737598, 129.081960337408 32.9857165479668)) ^^http://www.opengis.net/ont/geosparql#wktLiteral