def METHOD_NAME(cls, polygonal_map_feature_qs):
    """
    Make a PostGIS query that accurately calculates the area of
    the polygon(s) by first casting to a Geography.
    """
    area_sql = 'ST_Area(ST_Transform(polygon, 4326)::geography)'
    area_col_name = 'area'
    feature_areas = polygonal_map_feature_qs \
        .extra(select={area_col_name: area_sql}) \
        .values_list(area_col_name, flat=True)
    return feature_areas