メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.340735241766 43.7996798618379, 142.340610539633 43.7997823010829, 142.340482887745 43.7997003904155, 142.340170172248 43.7996070398115, 142.339025039887 43.7992192035832, 142.33945904495 43.7988798961062, 142.339537264853 43.7989217709045, 142.33978192977 43.7991050456247, 142.339968993356 43.7991904970406, 142.340735241766 43.7996798618379)) ^^http://www.opengis.net/ont/geosparql#wktLiteral