Instead of basing this on a tolerance check (yes, I know there's a tolerance check later on in the code, but two wrongs don't make a right :wink:) I'd be inclined to check for a change in cell "width". For example:
```python
pre_wrap_widths = np.diff(coord.bounds[inside_indices], axis=1)
post_wrap_widths = np.diff(bounds[inside_indices], axis=1)
split_cell_indices, _ = np.where(pre_wrap_widths != post_wrap_widths)
```