Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Isolines are lines on a map that connect points with equal values of a particular quantity, such as temperature, pressure, or elevation. They help visualize patterns and variations in data across a geographic area.
Related terms
Gradient: Measures how quickly a quantity changes over distance. Steeper gradients indicate rapid changes while gentler gradients indicate slower changes.
Interpolation: Estimating values within known data points using mathematical techniques to fill in missing information.
Extrapolation: Predicting values beyond known data points by extending trends or patterns observed within the given range.