isopleth map
nounUK /ˈaɪsəpleθ mæp/
US /ˈaɪsəpleθ mæp/
A map that uses lines to join places that share the same value, like temperature or rainfall.
The weather report showed an isopleth map with lines connecting cities that had the same temperature.
OTHER MEANINGS
2. A map using lines of equal value to show how a feature changes smoothly across an area.
Scientists used an isopleth map to track how air pollution spreads over the city.
3. A chart-like map where connected lines mark points of identical measurement.
The isopleth map made it easy to see where rainfall was heaviest.
4. A mapping tool for showing continuous data such as pressure or elevation with equal-value lines.
Meteorologists rely on an isopleth map to draw pressure patterns for forecasts.