code: def test_get_prime_meridians_map():
      prime_meridians_map = get_prime_meridians_map()
      assert prime_meridians_map["greenwich"] == "0dE"
  
imports: from numpy.testing import assert_almost_equal
  from pyproj.list import get_ellps_map, get_prime_meridians_map, get_proj_operations_map
label_desc: Use image node_id 3 for calling a global function with example usage: test_get_prime_meridians_map() without return types