The range of latitude angle

[ziye3001]

Hi Philippe,
I just tried to use your code for spherical data interpolation and it worked very well! While I was trying to figure out which coordinate system is being used, it occured to me that the range of your altitude angle is between [-90,90]. However, in your __polar_to_cartesianfunction, you use
z = r * np.cos(lat)
that means, the z-coordinate is always positive? I'm not sure if this will affect the result.

Thank you very much!

[TillLeiden]

I think Ziye is right.
The __polar_to_Cartesian function calculates from spherical to cartesian coordinates, but you use longitude and latitude, where latitude has an offset of np.pi/2 to the polar angle. This means also the x and y values are not correct.