Data acquisition and modeling are the two important, difficult and costful aspects in a Cybercity project. 2D-GIS is mature and can manage a lot of spatial data. Thus 3D-GIS should make the best of data and technology...Data acquisition and modeling are the two important, difficult and costful aspects in a Cybercity project. 2D-GIS is mature and can manage a lot of spatial data. Thus 3D-GIS should make the best of data and technology of 2D-GIS. Construction of a useful synthetic environment requires integration of multiple types of information like DEM, texture images and 3D representation of objects such as buildings. In this paper, the method for 3D city landscape data model and visualization based on integrated databases is presented. Since the data volume of raster are very huge, special strategies(for example, pyramid gridded method) must be adopted in order to manage raster data efficiently. Three different methods of data acquisition, the proper data structure and a simple modeling method are presented as well. At last, a pilot project of Shanghai Cybercity is illustrated.展开更多
Several factors overlap in making urban heritage conservation vulnerable in terms of long-term sustainability.The purpose of this study is to offer insights into the dynamic role that heritage governance plays in the ...Several factors overlap in making urban heritage conservation vulnerable in terms of long-term sustainability.The purpose of this study is to offer insights into the dynamic role that heritage governance plays in the current sustainability debate.This purpose is achieved by investigating the shift from a‘governing for culture’approach to a‘governing through culture’approach in heritage conservation.Subsequently,a case is built for a circularity-based conservation strategy applicable to the governance of historic cities.Different indicators of the circular governance approach are considered,and useful data are collected in comparative form.The cross-matching relationship between the factors is then evaluated by employing the analytic hierarchy process(AHP)on the collected data.As a test case,the conservation strategy of the Medina of Tunis is presented.For a more general conservation model,case-specific data are acquired.Finally,the same framework is applied to compare the case-dependent and case-independent data to define an integrated conservation framework.The obtained results show that the knowledge and data exchange factor,carries the highest significance.This result translates into heritage-led urban regeneration through knowledge sharing and the effective redistribution of cultural activities in historic city centres.展开更多
文摘Data acquisition and modeling are the two important, difficult and costful aspects in a Cybercity project. 2D-GIS is mature and can manage a lot of spatial data. Thus 3D-GIS should make the best of data and technology of 2D-GIS. Construction of a useful synthetic environment requires integration of multiple types of information like DEM, texture images and 3D representation of objects such as buildings. In this paper, the method for 3D city landscape data model and visualization based on integrated databases is presented. Since the data volume of raster are very huge, special strategies(for example, pyramid gridded method) must be adopted in order to manage raster data efficiently. Three different methods of data acquisition, the proper data structure and a simple modeling method are presented as well. At last, a pilot project of Shanghai Cybercity is illustrated.
文摘Several factors overlap in making urban heritage conservation vulnerable in terms of long-term sustainability.The purpose of this study is to offer insights into the dynamic role that heritage governance plays in the current sustainability debate.This purpose is achieved by investigating the shift from a‘governing for culture’approach to a‘governing through culture’approach in heritage conservation.Subsequently,a case is built for a circularity-based conservation strategy applicable to the governance of historic cities.Different indicators of the circular governance approach are considered,and useful data are collected in comparative form.The cross-matching relationship between the factors is then evaluated by employing the analytic hierarchy process(AHP)on the collected data.As a test case,the conservation strategy of the Medina of Tunis is presented.For a more general conservation model,case-specific data are acquired.Finally,the same framework is applied to compare the case-dependent and case-independent data to define an integrated conservation framework.The obtained results show that the knowledge and data exchange factor,carries the highest significance.This result translates into heritage-led urban regeneration through knowledge sharing and the effective redistribution of cultural activities in historic city centres.
