CLASS
    NAME "WSPLGEN_POLYGON"
    EXPRESSION ([DIFF] < 1)
    STYLE
        SIZE 5
        COLOR "#B2C9D7"
    END
END

CLASS
    NAME "WSPLGEN_POLYGON"
    EXPRESSION ([DIFF] >= 1 AND [DIFF] < 2)
    STYLE
        SIZE 5
        COLOR "#6F93AA"
    END
END

CLASS
    NAME "WSPLGEN_POLYGON"
    EXPRESSION ([DIFF] >= 2 AND [DIFF] < 3)
    STYLE
        SIZE 5
        COLOR "#426F8B"
    END
END

CLASS
    NAME "WSPLGEN_POLYGON"
    EXPRESSION ([DIFF] >= 3 AND [DIFF] < 4)
    STYLE
        SIZE 5
        COLOR "#214F6C"
    END
END

CLASS
    NAME "WSPLGEN_POLYGON"
    EXPRESSION ([DIFF] >= 3 AND [DIFF] < 4)
    STYLE
        SIZE 5
        COLOR "#021B2A"
    END
END