boxy = true;
    public PlotLayer() {        // precalculate for boxy        boxy = true;        getDataSource();        graph = new ScatterGraph(678, 790, null, temperature_data.overall_min_year_, temperature_data.overall_max_year_, temperature_data.overall_min_temp_, temperature_data.overall_max_temp_);        setList(plotDataSources());    }