To meet the requirements of efficient management and web publishing for marine remote sensing data, a spatial database engine, named MRSSDE, is designed independently. The logical model, physical model, and optimizati...To meet the requirements of efficient management and web publishing for marine remote sensing data, a spatial database engine, named MRSSDE, is designed independently. The logical model, physical model, and optimization method of MRSSDE are discussed in detail. Compared to the ArcSDE, which is the leading product of Spatial Database Engine, the MRSSDE proved to be more effective.展开更多
An Oracle8i-based approach is proposed to manage the integrated databases oflarge CyberCity.This approach consists of three schemes:①a special R+-tree index is designed toaccelerate spatial retrieving,in which the bo...An Oracle8i-based approach is proposed to manage the integrated databases oflarge CyberCity.This approach consists of three schemes:①a special R+-tree index is designed toaccelerate spatial retrieving,in which the bounding boxes of local regions have no intersection andall leaf nodes of the R+-tree(geometry records)have no repetition;②different data compressionalgorithms are adopted to compress the digital elevation models,3D vector models and images,suchas LZ77 lossless compression algorithm for compression of vector data and JPEG compressionalgorithms for texture images;③in order to communicate with Oracle8i database,a CyberCity GIS.spatial database engine(SDE)is designed.On the basis of this SDE prototype a case study is done.展开更多
基金Supported by the National 863 High-Tech Program of China （No.2007AA12Z237）, the Natural Science Foundation of China （No. 40571123）.
文摘To meet the requirements of efficient management and web publishing for marine remote sensing data, a spatial database engine, named MRSSDE, is designed independently. The logical model, physical model, and optimization method of MRSSDE are discussed in detail. Compared to the ArcSDE, which is the leading product of Spatial Database Engine, the MRSSDE proved to be more effective.
基金Project supported by the National Key Basic Research and Development Program(No.2002CB312101)the National Natural Science Foundation of China(No.40001017).
文摘An Oracle8i-based approach is proposed to manage the integrated databases oflarge CyberCity.This approach consists of three schemes:①a special R+-tree index is designed toaccelerate spatial retrieving,in which the bounding boxes of local regions have no intersection andall leaf nodes of the R+-tree(geometry records)have no repetition;②different data compressionalgorithms are adopted to compress the digital elevation models,3D vector models and images,suchas LZ77 lossless compression algorithm for compression of vector data and JPEG compressionalgorithms for texture images;③in order to communicate with Oracle8i database,a CyberCity GIS.spatial database engine(SDE)is designed.On the basis of this SDE prototype a case study is done.
