Describir: The planning of the modern city; a review of the principles governing :

__    __    ______   _    _      ___     __   __    _____    _____    
\ \\ / //  /_   _// | |  | ||   / _ \\   \ \\/ //  |  ___|| |  __ \\  
 \ \/ //    -| ||-  | |/\| ||  / //\ \\   \   //   | ||__   | |  \ || 
  \  //     _| ||_  |  /\  || |  ___  ||  / . \\   | ||__   | |__/ || 
   \//     /_____// |_// \_|| |_||  |_|| /_//\_\\  |_____|| |_____//  
    `      `-----`  `-`   `-` `-`   `-`  `-`  --`  `-----`   -----`   
                                                                      
  _____   
 |  ___|| 
 | ||__   
 | ||__   
 |_____|| 
 `-----`