dict(type='scattergeo',
    locationmode='country names',

    lon = [From_lon,To_lon],
    lat = [From_lat,To_lat],
    mode='lines + markers',
    opacity = max(min(1,float(df.iloc[i]['Volume']/2000)),0.1),
    #opacity = min(1,float(df.iloc[i]['Volume']/1000)),
    name = df.iloc[i]['ALP From'] + "->" + df.iloc[i]['ALP To'] + " " + df.iloc[i]['Volume'].astype(str),
    hoverinfo="name",
    line = dict(color=df.iloc[i]['Marker_col'],
                width = max(2,df.iloc[i]['Volume']/2000)
    )