/** Plot the world's biggest cities.  This uses the data from the basic CSV file
    at:

    https://simplemaps.com/data/world-cities
*/

use CSV.frink
use hashColor.frink

cities  = CSV.parseFileWithHeader["file:/home/eliasen/builds/worldcities/worldcities.csv"]
cities.makeColumnsNumeric[["lat","lng","population","id"]]

g = new graphics
g.color[0,0,0,.05]

for [name, name1, lat, long, country] = cities.data
{
   [r1,g1,b1] = hashColorToFloatRGB[country]
   g.color[r1, g1, b1, .1]
   g.fillEllipseSize[long, -lat, .7, .7]
}

g.show[]