code: def test_spot_check_eastingnorthing_to_lonlat(self):
      # Anchor implementation with a few hard-coded known values.
      # Generated ad-hoc from https://epsg.io/transform#s_srs=3857&t_srs=4326
  
      lon, lat = Tiles.easting_northing_to_lon_lat(0, 0)
      self.assertAlmostEqual(lon, 0)
      self.assertAlmostEqual(lat, 0)
  
      lon, lat = Tiles.easting_northing_to_lon_lat(1230020, -432501)
      self.assertAlmostEqual(lon, 11.0494578, places=2)
      self.assertAlmostEqual(lat, -3.8822487, places=2)
  
      lon, lat = Tiles.easting_northing_to_lon_lat(-2130123, 1829312)
      self.assertAlmostEqual(lon, -19.1352205, places=2)
      self.assertAlmostEqual(lat, 16.2122187, places=2)
  
      lon, lat = Tiles.easting_northing_to_lon_lat(-1000000, 5000000)
      self.assertAlmostEqual(lon, -8.9831528, places=2)
      self.assertAlmostEqual(lat, 40.9162745, places=2)
  
      lon, lat = Tiles.easting_northing_to_lon_lat(
          -20037508.34, 20037508.34
      )
      self.assertAlmostEqual(lon, -180.0, places=2)
      self.assertAlmostEqual(lat, 85.0511288, places=2)
  
file_path: holoviews/holoviews/tests/element/test_tiles.py
imports: import numpy
  import pandas
  from holoviews import Tiles
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 2 for calling the TestCoordinateConversion obj's underlying member method code with example usage: obj.test_spot_check_eastingnorthing_to_lonlat() without return types