Intro

The Felt Style Language is a way for advanced users to style data quickly, through simple JSON code. This document is a guide to use as you test data files in Felt. For an exhaustive guide to all supported properties see the Reference Documentation.

Style definition blocks

Learn how to define and configure the code blocks that compose the Felt Style Language

Style definition blocks

Types of visualizations

Learn about visualization types, including simple, categorical, numeric (color by & size by), heatmaps and hillshade.

Types of visualizations

Legends

Details on how to customize legends on a per-layer basis.

Legends

Errors

Definitions for errors raised when validating the Felt Style Language.

Errors