html,

body,

#container {

  width: 100%;

  height: 100%;

  margin: 0;

  padding: 0;

}

anychart.onDocumentReady(function () {

  anychart.data.loadJsonFile('https://gist.githubusercontent.com/shacheeswadia/a20ba5b62cef306ccc1a8e8857e5316a/raw/0337b16fa8dc4de97263bc0a4ededf935a529c35/migration-data.json', function (data) {

​

    // create a connector map chart instance

    var map = anychart.connector();

​

    // include the world map geodata

    map.geoData('anychart.maps.world');

​

    // darken all regions

    map

      .unboundRegions()

      .enabled(true)

      .fill('#E1E1E1')

      .stroke('#D2D2D2');

​

    // set the map chart title

    map

      .title('Migrations to the USA from the top 15 countries');

    // display all labels even if there is an overlap

    map. 

      overlapMode("allow-overlap");

​

    // a helper function to create the series

    // that will form the connector lines

    var createSeries = function (name, data, color) {

      // create and customize the connector series

      var connectorSeries = map

        .connector(data)

        .name(name)

        .fill(color)

        .stroke({

          color: color,

          thickness: 2

        });

      // change the coloring of the connector line in the hovered state

      connectorSeries

        .hovered()

        .stroke('1.5 #212121')

        .fill('#212121');

      // configure the arrow marker

      connectorSeries

        .markers()

        .position('100%')

        .fill(color)

        .stroke({

          color: color

        })

        .size(8);

      // configure the arrow marker in the hovered state

      connectorSeries

        .hovered()

        .markers()

        .position('100%')

        .size(10)

        .fill('#212121')

        .stroke('2 #455a64');

​

      // set the labels for the source countries

      connectorSeries

        .labels()

        .enabled(true)

        .format(function () {

          return this.getData('from');

        });

​

      // set the thickness of the connector line based on the series

      if (name === 'More than 50,000') {

        connectorSeries.startSize(5).endSize(2);

      } else if (name === '40,000 to 50,000') {

        connectorSeries.startSize(3.5).endSize(1.5);

      } else if (name === '20,000 to 40,000') {

        connectorSeries.startSize(3).endSize(1);

      } else if (name === '16,000 to 20,000') {

        connectorSeries.startSize(2).endSize(0.5);

      } else {

        connectorSeries.startSize(1).endSize(0);

      }

      // configure the settings for the legend items

      connectorSeries

        .legendItem()

        .iconType('square')

        .iconFill(color)

        .iconStroke(false);

​

    };

​

    // create a dataset from the data

    var dataSet = anychart.data.set(data).mapAs();

​

    // create five series filtering the data

    // by the absolute values of the migration numbers

    createSeries(

      'Less than 16,000',

      dataSet.filter('total', filterFunction(0, 16000)),

      '#fed693'

    );

    createSeries(

      '16,000 to 20,000',

      dataSet.filter('total', filterFunction(16000, 20000)),

      '#f5ad52'

    );

    createSeries(

      '20,000 to 40,000',

      dataSet.filter('total', filterFunction(20000, 40000)),

      '#3fb8c5'

    );

    createSeries(

      '40,000 to 50,000',

      dataSet.filter('total', filterFunction(40000, 50000)),

      '#1792c0'

    );

    createSeries(

      'More than 50,000',

      dataSet.filter('total', filterFunction(50000, 1000000)),

      '#1c5eaa'

    );

​

    // set up the legend for the sample

    map

      .legend()

      .enabled(true)

      .position('center')

      .padding([20, 0, 20, 0])

      .fontSize(10);

​

    map

      .legend()

      .title()

      .enabled(true)

      .fontSize(13)

      .padding([0, 0, 5, 0])

      .text('Number of Migrants (in the year 2019)');

​

    // set the container

    map.container('container');

​

    // draw the map

    map.draw();

​

  });

});

​

// a helper function to bind the data field to the local var.

function filterFunction(val1, val2) {

  if (val2) {

    return function (fieldVal) {

      return val1 <= fieldVal && fieldVal < val2;

    };

  }

  return function (fieldVal) {

    return val1 <= fieldVal;

  };

}