A Spot5-based Monitoring Study On New Construction Land In Urban Areas Of Chongqing

Each region of Chongqing appeared different degree of construction land growth, along with the development of the urbanization in mainland China, leading to the contradictions between the land for farmland or the construction. This paper combining RS, GIS and GPS technology of3S technique theory, and trough the analysis of existing research methods and achievements, using a set of reasonable and effective technology route to research Chongqing land use dynamic monitoring conditions of Chongqing city based on the2006-2008SPOT5remote sensing images.This paper first through the comparison between different bands correlation coefficient and the size of the single band information to evaluate and choice the best band combination for the image fusion; Using the objective evaluation method based on the statistical information consideration comprehensively of the land use change information extraction needs from the information entropy, average gradient and deviation three aspects, then according to the principle of the band combination chose the best fusion fusion method namely Brovey transformation from HIS transformation, PCA transform and Brovey transform. In order to improve the precision of monitoring, orthorectified the image using basic control material and Chongqing digital elevation model then get the clear, accurate research area DOM, Integrated computer automatic monitoring and artificial supervision mode, with two phases of the DOM, uses the image difference, spectral features variation, principal component analysis, band and replace etc. automatic method, determined primarily the position of the change information, then combining with artificial interpretation and interpretation to control precision, extract the change information about construction land and farmland, systematic analysis the urban area of Chongqing new construction land present situation and its change characteristics, finally get the2006-2008in Chongqing land use change of position, size and type; And evaluated the DOM and dynamic monitoring in the precision combined with the field measured GPS control points, validation study methods of experiment precision reliable effective; Based on the above research results, statistical collect monitoring information, then analysis the Chongqing city new construction land annual change, change type and change track. Statistical results show that the new construction land in Chongqing district has a different degree of change, its type is mainly composed of cultivated land, the agricultural crops and unused land; Through the establishment of Chongqing urban land use driving force index system and the related analysis, principal component analysis, the results showed that:Chongqing urban new construction land driving force factor can be reduced to economic factor, population growth factor, technological progress factor and policy system factor four aspects, then establishes the Chongqing urban land use change driving force comprehensive model to react the differences between these driving factors. This paper finally through analyzing the Chongqing city land use change conclusion, put forward four aspects of the Chongqing sustainable land use countermeasures and measures, separately from the land management, industrial structure and ecological reconstruction and economic development No matter about further research in the future of Chongqing urban construction land development trends or improve the urban construction land and land utilization or promote regional economy development, it all have the important reference meanings.