code: def to_latlon(geojson, origin_espg=None):
      
  
      if isinstance(geojson, dict):
  
          # get epsg code:
          if origin_espg:
              code = origin_espg
          else:
              code = epsg_code(geojson)
          if code:
              origin = Proj(init='epsg:%s' % code)
              wgs84 = Proj(init='epsg:4326')
              wrapped = test_wrap_coordinates(geojson['coordinates'], origin, wgs84)
              new_coords = convert_coordinates(geojson['coordinates'], origin, wgs84, wrapped)
              if new_coords:
                  geojson['coordinates'] = new_coords
              try:
                  del geojson['crs']
              except KeyError:
                  pass
  
      return geojson
docs: Convert a given geojson to wgs84. The original epsg must be included insde the crs
      tag of geojson