Describir: Growth centres and growth cities :

 _____       ___      ______    _____                ___      _____   
|  __ \\    / _ \\   /_   _//  |  ___||   ____      / _ \\   /  ___|| 
| |  \ ||  / //\ \\  `-| |,-   | ||__    |    \\   | / \ || | // __   
| |__/ || |  ___  ||   | ||    | ||__    | [] ||   | \_/ || | \\_\ || 
|_____//  |_||  |_||   |_||    |_____||  |  __//    \___//   \____//  
 -----`   `-`   `-`    `-`'    `-----`   |_|`-`     `---`     `---`   
                                         `-`                          
 _    _   
| || | || 
| || | || 
| \\_/ || 
 \____//  
  `---`