Are Level in this box on the figure means constant psi ?

Are Level in this box on the figure means constant psi ?

[dpb]

Yes. Those are isolines

[Shreen El-Sapa]

Thanks for your reply. How can i replace data in this figure with the values of the contour?

[dpb]

Dunno. How did you generate the figure? Giving us something to work with is far simpler than expecting folks to try to duplicate something from scratch.

"Help us help you!"

[Adam Danz]

What do you mean "value of the contour"?

"Level" is the contour value. See this answer for an explanation. Otherwise, please follow dpb's advice and give us more info about how the image was generated.