The metropolitan area is a crucial spatial element in promoting new urbanization in China.It possesses theoretical and empirical value in the determination of the evolutionary patterns and development trends necessary...The metropolitan area is a crucial spatial element in promoting new urbanization in China.It possesses theoretical and empirical value in the determination of the evolutionary patterns and development trends necessary for regional integration and high-quality development.This study focused on Nanjing Metropolitan Area,the first national metropolitan area in China,and established three development scenarios by combining ecological–economic spatial conflict(EESC)zones and national key ecological functional areas.These scenarios simulate the spatial distribution of future land use and land cover change(LUCC)using the development zone planning function of the patch generation land use simulation(PLUS)model.The results show that:(1)Between 2000 and 2020,the most prominent characteristics of land use change were largely the massive expansion of built-up land and the significant decline of farmland,while changes in the area of ecological land were less evident.(2)EESC areas experienced significant changes over the past 20 years,but the overall level of conflict was low.Ecological land was the main land use type in the lowest-conflict area,while built-up land was the main land use type in the highest-conflict area.(3)From 2030 to 2050,further expansion of built-up areas is expected,with continued decrease of farmland.The regulation of these land use changes can be achieved through different development zone plans.The economic development scenario had the largest built-up land area,while the ecological protection scenario had the largest farmland area.This study simulates the spatial pattern changes in the metropolitan area based on spatial conflict patterns and national main functional area planning process,providing a scientific reference for future spatial planning and management.展开更多
The symbolization of land polygon is an important part of cartography.In the mapping of traditional present land-use maps,the symbol of land polygons was usually filled by the method of filling or plotting,but these m...The symbolization of land polygon is an important part of cartography.In the mapping of traditional present land-use maps,the symbol of land polygons was usually filled by the method of filling or plotting,but these methods can't solve the spatial conflicts of the symbol.According to the principle of cartography,the rule of how to symbolize the land polygon was summarized,and a new method that can generate and deploy the land symbols was presented.By making use of C#programming language and Arc Engine developing components,the algorithm can generate land symbols presenting triangle and adjust the coordinate of the symbol.Through mapping the present land-use map of Honghe county,this algorithm can reduce 88.84%of the spatial conflicts error rate compared with the traditional methods.It improves the accuracy and efficiency of the map symbolic.展开更多
基金National Natural Science Foundation of China,No.42371185National Science Fund for Distinguished Young Scholars,No.41901151。
文摘The metropolitan area is a crucial spatial element in promoting new urbanization in China.It possesses theoretical and empirical value in the determination of the evolutionary patterns and development trends necessary for regional integration and high-quality development.This study focused on Nanjing Metropolitan Area,the first national metropolitan area in China,and established three development scenarios by combining ecological–economic spatial conflict(EESC)zones and national key ecological functional areas.These scenarios simulate the spatial distribution of future land use and land cover change(LUCC)using the development zone planning function of the patch generation land use simulation(PLUS)model.The results show that:(1)Between 2000 and 2020,the most prominent characteristics of land use change were largely the massive expansion of built-up land and the significant decline of farmland,while changes in the area of ecological land were less evident.(2)EESC areas experienced significant changes over the past 20 years,but the overall level of conflict was low.Ecological land was the main land use type in the lowest-conflict area,while built-up land was the main land use type in the highest-conflict area.(3)From 2030 to 2050,further expansion of built-up areas is expected,with continued decrease of farmland.The regulation of these land use changes can be achieved through different development zone plans.The economic development scenario had the largest built-up land area,while the ecological protection scenario had the largest farmland area.This study simulates the spatial pattern changes in the metropolitan area based on spatial conflict patterns and national main functional area planning process,providing a scientific reference for future spatial planning and management.
基金Project(41061043)support by the National Natural Science Foundation of China
文摘The symbolization of land polygon is an important part of cartography.In the mapping of traditional present land-use maps,the symbol of land polygons was usually filled by the method of filling or plotting,but these methods can't solve the spatial conflicts of the symbol.According to the principle of cartography,the rule of how to symbolize the land polygon was summarized,and a new method that can generate and deploy the land symbols was presented.By making use of C#programming language and Arc Engine developing components,the algorithm can generate land symbols presenting triangle and adjust the coordinate of the symbol.Through mapping the present land-use map of Honghe county,this algorithm can reduce 88.84%of the spatial conflicts error rate compared with the traditional methods.It improves the accuracy and efficiency of the map symbolic.
