Values on a uniform grid
        
        :param lon_edges: longitude edges
        :param lat_edges: latitude edges
        :param values: matrix representing values on the grid 
        :param cmap: colormap name
        :param alpha: color alpha
        :param vmin: minimum value for the colormap
        :param vmax: maximum value for the colormap
        :param levels: number of levels for the colormap
        :param colormap_scale: colormap scale
        :param show_colorbar: show the colorbar in the UI

def grid(lon_edges, lat_edges, values, cmap, alpha=255, vmin=None, vmax=None, levels=10, colormap_scale='lin', show_colorbar=True):
    """
        Values on a uniform grid
        
        :param lon_edges: longitude edges
        :param lat_edges: latitude edges
        :param values: matrix representing values on the grid 
        :param cmap: colormap name
        :param alpha: color alpha
        :param vmin: minimum value for the colormap
        :param vmax: maximum value for the colormap
        :param levels: number of levels for the colormap
        :param colormap_scale: colormap scale
        :param show_colorbar: show the colorbar in the UI
        """
    from geoplotlib.layers import GridLayer
    _global_config.layers.append(
        GridLayer(lon_edges, lat_edges, values, cmap, alpha, vmin, vmax, levels, colormap_scale, show_colorbar))