Abstract
Abstract. Sustainable development requires monitoring the state and changes of the city and providing the appropriate information to users anytime and anywhere. This paper takes Ningbo City as the research area, by utilizing two temporal (March 25, 2012 and November 25, 2013) ZY-3 satellite remote sensing data. 3S technology is used for urban grid management. The remote sensing information extraction of Ningbo City includes: extraction of building change information, extraction of green space change information, extraction of water information and analysis of eutrophication correspondingly. When extracting change information, we take "change information" as a special kind of "geographic information" to study the characteristics of different bands in multi-temporal data, and follow the first law of geography, namely adjacent similar principle. The extracted raster information is further converted into GIS vector format data as a basis for dynamic monitoring of Ningbo Urban Management systems: on the one hand, it can meet the demands of multi-source spatial data analysis (such as: overlay analysis, buffer analysis, etc.); on the other hand, it could meet the requirements of daily urban management. Dynamic monitoring system of Ningbo city management adopts the urban grid management mode. Based on GIS and GPS, grid management can satisfy the urban management mode –someone bear responsibility within the grid, somebody do the task under the supervision of the lattice, and at the same time play the role of remote sensing field surveying. To some extent, integrated 3S technology and urban grid management is a practical alternative of minimizing the uncertainty of remote sensing data and information extraction. With multi-scale and multi-dimensional remote sensing data, 3S integration and the urban grid management can monitor the urban state and its spatial-temporal changes. It’s helpful for discovery and analysis of urban problems about resources, environment, ecology and disaster, from phenomena to nature, and it is a necessary part of sustainable urbanization.
Highlights
Sustainable development is an important issue in today's society, where sustainable urbanization is an important part and an important trend of future development
The data format of remote sensing data is raster, which means that whatever information we get from remote sensing data should be raster data, whereas the foundation data in urban grid management is the vector GIS data, and the raster data is usually regarded as the background data
Called “Yong” for short, is the second largest city in Zhejiang Province and known as many honors, such as the national historical and cultural city approved by Ministry of Culture of the People's Republic of China, one of the five regional centers in Yangtze River Delta, economic center of the south wing in Yangtze River Delta, the economic center of Zhejiang Province, an important international gateway to the Asia-Pacific region, a modern international port city, and three consecutive re-election civilized cities in China
Summary
Called “Yong” for short, is the second largest city in Zhejiang Province and known as many honors, such as the national historical and cultural city approved by Ministry of Culture of the People's Republic of China, one of the five regional centers in Yangtze River Delta, economic center of the south wing in Yangtze River Delta, the economic center of Zhejiang Province, an important international gateway to the Asia-Pacific region, a modern international port city, and three consecutive re-election civilized cities in China. As for the ecological environment, Ningbo is one of the 8 drainage systems in Zhejiang Province, sandwiched between the ocean and low-lying mountains to the southwest. The booming of construction projects and the decreasing of green space presents considerable challenges to the protection and construction of the ecological environment. There is a need to extract ecological information from remote sensing. Using the remote sensing data as main data resource, the urban grid management involves illegal construction supervision system, landscaping monitoring system, eutrophication monitoring system, sediment monitoring system and so on
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