title: Isoline
text: # Isoline
  
  Isoline may refer to:
  
  * Contour line (line of constant elevation or depth, sometimes used to describe other lines of constant value)
     * A line of constant value on a map or chart. Examples include isobar (equal barometric pressure), isotherm (equal temperature), and isohyet (equal precipitation).
  * Isoline (opera), an opera by André Messager
  