III. ENVIRONMENT MONITORING AND URBAN PLANNING
D. Land use in Shanghai
Land use is the spatial projection of the man/earth relationship. To understand it easily, take a land use map as an example. If its polygons vary sharply in size and shape, and display no order, it possibly indicates a lack of harmony between man and nature. If the combination of colours loses balance, lacking green and blue which represent bio-diversity, there likely exists a conflict between man and environment.
Since it was opened 150 years ago, Shanghai has experienced several shifts of function by its managers at different times. They left fleeting prosperity and a cultural legacy combining east and west spirits, along with various environmental wounds by seeking maximum profit that could be obtained from the city without any consideration as to its consequences. What we once saw was factories encircling the city, workshops competing with residential quarters for space, urban green space used for manufacturing, and the city filled with noise, waste gas, dust and wastewater. Combined, these have blocked the progress of Shanghai towards becoming an international metropolis of the next century.
As human civilization advances, man is continually creating new types of land use, and also creating land use maps to record the spatial patterns and temporal sequence of changes that man has made to the environment. Thus the land use maps mirror whether regional development is rational or not.
Shanghai boasts multi-temporal aero remote sensing images which have been interpreted for land use maps. These materials record the urban expansion and dynamic changes in urban development, therefore are primary references for understanding the urbanization of Shanghai.