  In this paper, we demonstrate how deck.gl, an open-source project born out of
data-heavy visual analytics applications, has grown into the robust
visualization framework it is today. We begin by explaining why we built
another data visualization framework in the first place. Then, we summarize our
design goals (distilled from our interactions with users) and discuss how they
guided the development of the framework's main features. We use two real-world
applications of deck.gl to showcase how it can be applied to simplify the
creation of data-heavy visualizations. We also discuss our lessons learned as
we continue to improve the framework for the larger visualization community.
