Grid With Technical Support From The Population Distribution Pattern And Then - Pudong New Area, For Example

Population re-distributing refers to the changing process of population distribution patterns. Spatial analysis is the important part in population re-distributing study. GIS technology has its outstanding advantages in spatial analysis, so by using GIS technology and spatial interpolation theory and the analysis technology of grid we can analyze the population data of Pudong New District, which is available by the fourth and the fifth census. And on the basis of analysis, the paper has studies the population re-distribution pattern of Pudong New District, explored the influencing factors and forming mechanism of Pudong population status, and population developing trend. The paper has aslo put forward the macro controlling policy of Pudong population re-distribution.When census is taken, census region is usually compartmentalized by administration district. Thus, if there is any change in administration district, population data of different census year cannot be contrasted directly in space. Using GIS spatial analysis technology, grid analysis methods and spatial interpolation theory to compute the population density of every grid unit in corresponding year, on the one hand, can improve the comparability in different census year's population data which is caused by the change of administration district.The analysis result shows that in 1990, population distribution ofPudong district has an obvious characteristic of distributing in different levels. The first level is Lujiazui Area, which has the highest populationdensity-above 20000 persons per sq.km; the second level is the zonalarea of Jinqiao-Meiyuan-Weifang-Kangqiao-Shanggang, where the population density is between 10000-20000 persons per sq.km; the third level is the area east to the second level, where the population density is 2000 persons per sq.km. In 2000, population distribution has a characteristic of mixed structure, that is, distributing in different levels and multi-core structure co-exists. The level in the west becomes larger along the Huangpu river when compared with that of 1990's. This level accords with the second level of 1990's approximately. The population density there is 20000 persons per sq.km. The prominent status of Lujiazui area is not so obvious as before. Due to population following industry's distribution, a new population phenomena of Pudong arises in 2000, that is, there are some multi-core population increasing regions: gaoqiao-waigaoqiao, jinqiao, huamu-zhangjiang. And the scope of the first and second level move towards east, north, and south.the writer of this paper use Visual Basic 6.0 and Mapobjects 2.1 of ESRI to develop the spatial distribution analysis system, and there are I/O interface and spatial analysis function in the system. This system can be used to analyze social and economic data of any region, and can be used to create many kinds of thematic maps which are based on grid network.Analysis result can be outputted conveniently for further research and application. The system has been also used successfully in the project of Taicang society and economy analysis.