def METHOD_NAME(data, raster_coordinate):
    """ calculate the geographic coordinate """
    proj_crs = CRS.from_string(data['wkt_projection_string'])
    transformer = process_grib.get_transformer(proj_crs, NAD83_CRS)
    padf_transform = Affine.from_gdal(*data['geotransform'])
    data['geographic_coordinate'] = \
        process_grib.METHOD_NAME(
        raster_coordinate, padf_transform, transformer)