Multiple nuclei model

The Multiple nuclei model is a basic model in modern urban planning.Encyclopedia of Human Geography, ed. Barney Warf (Thousand Oaks, CA: Sage Publications, 2006), p. 34 It was developed by Chauncy Harris and Edward Ullman in 1945.Yan Liu, Modelling Urban Development with Geographical Information Systems and Cellular Automata (Boca Rattan, FL: CRC press, 2009), p. 9 It was the third model in the Chicago school (architecture). The main idea was that when a city reached a certain size its downtown central business district (CBD) could no longer serve the whole city.Simon Ross; John Morgan; Richard Heelas, Essential AS Geography (Cheltenham: S. Thornes, 2000), pp. 277–278 Shops and offices move to the outer parts of the city. They grow and attract other businesses. This causes the areas around them to grow into new business centers. 

 Related pages 
 Grid plan
 Sector model
 Concentric zone model
 Linear city model

 References 

Category:Urban planning
Category:Urban geography