Concepts

Dive into the fundamentals of data visualization in this series of explainer articles.
Categorical vs Numerical Data
Learn about these concepts and how they relate to nominal, ordinal, discrete, and continuous data types.
GeoJSON Format
Learn about this format for encoding geographic data structures for use in maps.
Independent vs Dependent Variables
Learn about the role of independent and dependent variables as well as how to place them on chart axes.
Interpolation between Data Points
Learn about linear and cubic curves as well as the unique value of Steffen's monotonic cubic method.
Latitude and Longitude
Learn the basics of the coordinate system used to measure angular distances on Earth and pinpoint locations globally.
Map Projections
Understand different ways in which the Earth is represented on a two-dimensional space.
Wide vs Long Data Formats
Discover the differences between these two data formats and the implications when building charts and maps.