Data-driven styles

Data-driven styles

Data-driven styles answer questions about your data, such as Where? What? How much? When? or a combination of those questions. A layer's style is configured with its renderer.

A renderer defines how symbols are applied to each feature. In the case of a data-driven visualization, the symbol is always determined based on data (or an attribute value) returned from one of two data sources:

• Field value (and optional normalization field) - Field values are typically referenced using a field or column name from a layer, a table, or a service.
• Arcade expression - An expression evaluating to a number or text value. Arcade expressions are typically referenced as a string in the valueExpression property of a renderer or visual variable.

The renderer will match the values returned from these sources to a predefined symbol used to represent each feature, or use the data value to override one of the symbol's properties, such as size or color.

API support