title: Get finer grid - Python
body: <p>I wanna have a 5x5 grid of movable points.
  Those form a maybe pillow kinda shape. I want the splines to be cubic.
  Then i wanna fit a way finer grid, like 100x50, in that.
  I dont want to interpolate any values but to know where the finer grid would be in x-y.</p>
  <p>Has anyone ever done something like this? Is there a way to interpolate a finer grid in a rougher one?</p>
  <p><a href="https://i.stack.imgur.com/SuBdJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SuBdJ.png" alt="enter image description here" /></a></p>