code: def __init__(self, data, cmap="hot_r"):
      self.data = data
      if cmap is not None:
          self.cmap = geoplotlib.colors.ColorMap(cmap, alpha=196)
      else:
          self.cmap = None
  
file_path: geoplotlib/examples/quadtree.py
imports: import geoplotlib
  from geoplotlib.layers import BaseLayer
  from geoplotlib.core import BatchPainter
  from geoplotlib.utils import BoundingBox
  import numpy
label_desc: Use image node_id 1 to create a new QuadsLayer object from inherited base classes: BaseLayer with example: obj = QuadsLayer(data, cmap)