isarithmic map
nounUK /ˌaɪsəˈrɪðmɪk mæp/
US /ˌaɪsəˈrɪðmɪk mæp/
A map that uses lines to join places that share the same value, like height or temperature.
The weather report showed an isarithmic map with lines connecting cities that had the same temperature.
OTHER MEANINGS
2. A map where curved lines connect points of equal rainfall.
The isarithmic map helped farmers see which areas got the most rain.
3. A map using lines to show equal air pressure across a region.
Meteorologists studied the isarithmic map to track the storm.
4. A map that links places with the same population density using lines.
The isarithmic map showed crowded and empty parts of the country.