code: def coord_map(xlim=None, ylim=None, flip=False):
      """
      Project a portion of the earth, which is approximately spherical,
      onto a flat 2D plane.
      Map projections generally do not preserve straight lines, so this requires considerable computation.
  
      Parameters
      ----------
      xlim : list
          Limits (2 elements) for the x axis.
          1st element defines lower limit, 2nd element defines upper limit.
          None means no lower / upper bound - depending on the index in list.
      ylim : list
          Limits (2 elements) for the y axis.
          1st element defines lower limit, 2nd element defines upper limit.
          None means no lower / upper bound - depending on the index in list.
      flip : bool
          Flip the coordinate system axis so that horizontal axis becomes vertical and vice versa.
  
      Returns
      -------
      `FeatureSpec`
          Coordinate system specification.
  
      Examples
      --------
      .. jupyter-execute::
          :linenos:
          :emphasize-lines: 6
  
          from lets_plot import *
          from lets_plot.geo_data import *
          LetsPlot.setup_html()
          us = geocode_states('US-48').get_boundaries(4)
          ggplot() + geom_map(map=us, fill='gray', color='white') + \\
              coord_map(xlim=(-130, -100))
  
      """
  
      return _coord("map", xlim=xlim, ylim=ylim, flip=flip)
  
imports: from .core import FeatureSpec
label_desc: Use image node_id 3 for calling a global function with example usage: coord_map(xlim, ylim, flip) and returns: _coord