The relationships of Cities and CityPlanning

Cities exist for many reasons.When storable food was enough,people wanted to exchange productions with others'.So a market was met with this requirement.Then there are more and more people to gather around the market.At last,it developed into a city.However,a multitude of factors can exert a vital impact on the development,such as location of rivers,wars,policies,weather,etc.

All of us should know the limits of environment,sociaty and economy of a city.Some said we could broaden the horizons of a city.But the improvements of urban infastructure can't come up with the speed of expanding.Therefore a city planning is necessary and urgent for modern cities to regulate themselves.

The purpose of plan was to achieve circulation of the populace and provide fortification against invasion for Eurpean city.Modern urban planning and redevelopment arose in response to the disorder and squalor of the slums created by the Industrial Revolution.Lynch(Cambridge,MA,MIT Press,1981) offers seven basic dimensions of city perforamnce:vitality,sense,fit,access,control,efficience and justice.Aterrific city should successfully fulfil the biological needs of it sinhabitants,and provides a safe environment for their activities.
As a result,it is not only a challenge but also an opportunity for a city to grasp urban planning to acheve a efficient city.

Fig1 a poor corner of a city (http://gigapan.org/gigapans/88307/)

 

Fig2 American city planning(http://n0t.nu/?p=1436)