Note: Support for 3D on mobile devices may vary, view the system requirements for more information.

This sample demonstrates how to generate a data-driven continuous size visualization with different themes: above, below, and above-and-below. This is accomplished with the createContinuousRenderer() method in the univariateColorSize or size renderer creator objects.

These themes are well suited for some data variables, such as change in population between two years. The layer in this sample uses an Arcade expression to calculate the change in population from 2000 to 2010.

// TOTHU10 = Total population in 2010
// TOTHU00 = Total population in 2000
$feature.TOTHU10 - $feature.TOTHU00

You can create several good visualizations with just that variable. The themes mentioned above help the user answer the following questions.

Where did the number of households increase from 2000-2010?

Theme: above

const params = {
  layer,
  view,
  theme: `above`,
  valueExpression: `$feature.TOTHU10 - $feature.TOTHU00`,
  valueExpressionTitle: `Increase in number of households 2000-2010`,
  minValue: -1000,
  maxValue: 2000
};

const { renderer } = await sizeRendererCreator.createContinuousRenderer(params);
layer.renderer = renderer;

Where did the number of households decrease from 2000-2010?

Theme: below

const params = {
  layer,
  view,
  theme: `below`,
  valueExpression: `$feature.TOTHU10 - $feature.TOTHU00`,
  valueExpressionTitle: `Decrease in number of households 2000-2010`,
  minValue: -1000,
  maxValue: 2000
};

const { renderer } = await sizeRendererCreator.createContinuousRenderer(params);
layer.renderer = renderer;

Where did the number of households increase or decrease from 2000-2010?

Theme: above-and-below

const params = {
  layer,
  view,
  theme: `above-and-below`,
  valueExpression: `$feature.TOTHU10 - $feature.TOTHU00`,
  valueExpressionTitle: `Change in number of households 2000-2010`,
  symbolOptions: {
    // Other symbol styles include the following:
    //
    // "caret" | "circle-caret" | "arrow" | "circle-arrow" |
    // "plus-minus" | "circle-plus-minus" | "square" | "circle" |
    // "triangle" | "happy-sad" | "thumb"
    symbolStyle: "arrow"
  }
  minValue: -1000,
  maxValue: 2000
};

const { renderer } = await univariateColorSizeRendererCreator.createContinuousRenderer(params);
layer.renderer = renderer;

Additional visualization samples and resources

• Data-driven continuous size
• Generate data-driven continuous size visualization
• Data-driven extrusion