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.
Learn how to define and configure the code blocks that compose the Felt Style Language
Style definition blocksLearn about visualization types, including simple, categorical, numeric (color by & size by), heatmaps, H3, and raster (imagery, numeric, categorical, and hillshade).
Types of visualizationsShared building blocks referenced throughout the language: smart "auto" colors and named palettes, the icon catalog, and the classification methods used to turn numbers into classes.
Details on how to customize legends on a per-layer basis.
LegendsDefinitions for errors raised when validating the Felt Style Language.
ErrorsLast updated
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