In another case, American archaeologists Rene Million and George Cowgill spent years systematically mapping the entire city of Teotihuacan in the valley of Mexico near what is now Mexico City.

在另一个案例中，美国考古学家家雷内·米利恩和乔治·考吉尔花了数年时间，系统地测绘了位于墨西哥河谷的整个特奥蒂瓦坎市，即现在的墨西哥城附近。