isogram

• Ligne tracée sur une carte reliant des points de valeur numérique égale pour une variable donnée.

A line drawn on a map connecting points having the same numerical value of some variable.

1. Contour line on a mapB2formalscientific

   A line drawn on a map or chart connecting points where a particular variable, such as temperature, pressure, or elevation, has the same value.

   isoplèthe

   • The meteorologist used isograms to show areas of equal temperature across the region.
   • Topographic maps use isograms called contour lines to represent elevation.
   • This weather map displays isobars, which are isograms of atmospheric pressure.

   Synonymescontour lineisarithmisopleth