code: def grid(lon_edges, lat_edges, values, cmap, alpha=255, vmin=None, vmax=None, levels=10, colormap_scale='lin', show_colorbar=True):
      
      from geoplotlib.layers import GridLayer
      _global_config.layers.append(
          GridLayer(lon_edges, lat_edges, values, cmap, alpha, vmin, vmax, levels, colormap_scale, show_colorbar))
docs: 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