code: def hist(data, cmap='hot', alpha=220, colorscale='sqrt', binsize=16, show_tooltip=False,
           scalemin=0, scalemax=None, f_group=None, show_colorbar=True):
      
      from geoplotlib.layers import HistogramLayer
      _global_config.layers.append(HistogramLayer(data, cmap=cmap, alpha=alpha, colorscale=colorscale,
                                      binsize=binsize, show_tooltip=show_tooltip, scalemin=scalemin, 
                                      scalemax=scalemax, f_group=f_group, show_colorbar=show_colorbar))
docs: Create a 2D histogram
  
      :param data: data access object
      :param cmap: colormap name
      :param alpha: color alpha
      :param colorscale: scaling [lin, log, sqrt]
      :param binsize: size of the hist bins
      :param show_tooltip: if True, will show the value of bins on mouseover
      :param scalemin: min value for displaying a bin
      :param scalemax: max value for a bin
      :param f_group: function to apply to samples in the same bin. Default is to count
      :param show_colorbar: show colorbar