geodata.cutout.calc_grid_area
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.. py:function:: geodata.cutout.calc_grid_area(lis_lats_lons)

   Calculate area in km^2 for a grid cell given lats and lon border, with help from:
   https://stackoverflow.com/questions/4681737/how-to-calculate-the-area-of-a-polygon-on-the-earths-surface-using-python