scipy.interpolate
scipy.interpolate.BivariateSpline.get_residual
scipy.interpolate.SmoothBivariateSpline
BivariateSpline.
integral
Evaluate the integral of the spline over area [xa,xb] x [ya,yb].
The end-points of the x integration interval.
The end-points of the y integration interval.
The value of the resulting integral.