show distance in average per grid

[jebika]

I am calculating the distance between a point cloud and a surface, and I know the results can be shown as a scalar field (distance per point). However, I want to display the average distance per grid (for example, every 10x10 cm).

I’ve attached an illustration of the result I am aiming for.

If anyone has a solution or idea, I’d really appreciate it! Thank you!