let lng;

let lat;

let popu;

let cNum;

​

function preload(){

  cities=loadTable('worldcities.csv','csv','header')

}

​

function setup() {

  createCanvas(400, 400);

  cNum=cities.getRowCount();

  lat=cities.getColumn('lat');

  lng=cities.getColumn('lng');

  popu=cities.getColumn('population')

    background(220);

}

​

function draw() {

  for(let i=0;i<cNum;i++){

      let circleX=map(lat[i],-200,200,0,400);

      let circleY=map(lng[i],-200,200,0,400);

    fill(0,0,255);

    noStroke();

    circle(circleY,circleX,popu[i]/900000);

  }

​

}