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Some Issues of Multi-dimensional and Dynamic GISs

CHEN Jun 1 JIANG Jie 2 (1 National Geomatics Center of China,1 Baishengcun, Zizhuyuan, Beijing,China,100044) (2 University of Mining and Technology (Beijing),D11 Xueyuan Road,Beijing,China,100083)  
For some traditional GIS application fields such as urban management and mining,the use of the technology was previously restricted by the static 2_dimensional GIS databases.With the rapid development of earth observation technology,large volumes of spatial information become available in an increasing updating frequency.As one direct benefit of such development,multi_dimensional and multi_temporal data become more readily available in the fields such as surveying and mapping,oceanography and environment.This stimulates the expansion of GIS technology to include dynamic 3_dimensional (or multi_dimensional) data and to develop associated data handling and processing methodology.Recently,for better understanding the earth environment and to support the sustainable development,a concept of dynamic multi_dimensional “digital earth" has emerged based on multi_resolution geo_spatial data. However,new challenges have been raised on maintaining and analyzing the spatio_temporal data synthetically and dynamically.The key issues include: (1) The data models and data modeling methods used by current commercial GIS software are basically designed to handle 2_D static spatial objects.It is difficult for them to represent dynamically changing 3_D spatial objects and to support Internet based interoperation among distributed heterogeneous multi_dimension spatial data; (2) The maintenance of topological relations and data access for multi_dimension data are much more complicated than those of the 2_D data.Simply extending the traditional methods used in 2_D to handle multi_dimensional data would hardly meet the new requirements.For instance,we could not simply extend 2_D Morton Code for accessing 3_D spatial data; (3) For multi_dimension spatial data,new methods need to be developed for data interpolation,visualization and human_computer interaction. Recent years we have witnessed a rapid growth of research interest and applications on multi_dimensional data handling and modeling.Large volumes of literature become available in various conference proceedings and international journals.International Society for Photogrammetry and Remote Sensing (ISPRS),being the leading professional group in the field,plays a very important role.Numerous working groups are involved in the related communion,including Inter_Comm.WG IV/III 1 (GIS Fundamentals and Spatial Databases),Inter_Comm.WG IV/III 2 (Integration of image analysis and GIS),WG II/2 (Software and Modeling Aspects of Integrated),WG IV/ (Database Design and Spatial data access),WG IV/3 (Temporal Aspects and Topographic database Maintenance),etc.The International Geographer Union (IGU) Study Group on Geographical Information Sciences also takes part in the study.Several international symposia have been held in this study field since 1994,including: (1)International Conference on “Advanced Geographic Data Modeling _ Spatial Data Modeling and Query Languages for 2_D and 3_D Application" held in the Netherlands,1994; (2) International Conference on “Towards 3D,Temporal and Dynamic Spatial Data Modeling and Analysis" held in Wuhan,China,1995;(3)International Conference on “Advances in GIS Research _ 7th International Symposium on Spatial Data Handling" held in Delft,the Netherlands,1996; (4)International Workshop on “Dynamic and Multi_Dimensional GIS" held in Hong Kong,1997; (5)International Workshop on “Urban 3D/Multi_Media Mapping" help in Tokyo,Japan,1999; (6)The Second International Workshop on “Dynamic and Multi_Dimensional GIS"(DMGIS'99) held in Beijing,China,1999.In the DMGIS'99 which was held in Beijing not long ago,more than 160 scientists and experts from 15 countries and regions attended the conference,and 72 papers are presented.Current front_line research topics are extensively discussed and an excellent up_to_date overview on the techniques and technological achievements on dynamical and multi_dimensional GIS were provided. The current research topics in this area include,such as 3_D spatial data modeling,spatio_temporal data model,dynamic handling of spatial data,inte
【Fund】: 国家自然科学基金资助项目 !编号 6983 3 0 10
【CateGory Index】: P208
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