メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.316469532255 42.2873107510691, 143.317067128153 42.287559680611, 143.316566241039 42.2882030033002, 143.316516378658 42.288274086236, 143.315916633631 42.2880213753674, 143.315283306528 42.2877544830913, 143.315324075369 42.2877003661636, 143.315828152837 42.2870435142838, 143.316469532255 42.2873107510691)) ^^http://www.opengis.net/ont/geosparql#wktLiteral