Remove vertical coordinate notebook from index

docs/index.rst

@@ -26,7 +26,6 @@ This python package is strongly inspired by the `UCLA MATLAB tools <https://gith
    Creating a grid <grid>
    Creating tidal forcing <tides>
    Creating surface forcing <surface_forcing>
-   Creating a vertical coordinate <vertical_coordinate>
    Creating initial conditions <initial_conditions>
    Creating boundary forcing <boundary_forcing>
 

docs/methods.rst

@@ -64,7 +64,7 @@ The :meth:`roms_tools.Grid.add_topography_and_mask` method completes five steps:
 1. The mask is defined using a dealiased version of the interpolated topography from step 0. In this step, the topography is evaluated at each grid point: values smaller than 0.11 meters are classified as land, and values larger than 0.11 meters are classified as ocean.
 2. The interpolated topography from step 0 is smoothed over the entire domain with a smoothing factor of 8. This step ensures that the topography is smooth at the grid scale, a prerequisite for avoiding grid-scale instabilities at runtime.
 3. The mask is modified by filling enclosed basins with land.
-4. Regions where the ocean depth is shallower than ``hmin`` are set to ``hmin``. The topography is then smoothed locally in such a way that the maximum slope parameter ``r_max`` is smaller than 0.2. The maximum slope parameter is given by
+4. Regions where the ocean depth is shallower than ``hmin`` are set to ``hmin``. The topography is then smoothed locally in such a way that the maximum slope parameter ``r`` is smaller than 0.2. The maximum slope parameter is given by
 
    .. math::
       r = \max \left( \frac{|\Delta_x h|}{2h}, \frac{|\Delta_y h|}{2h} \right).