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In Three Gorges reservoir area of China, 3D visualization and analysis functions are widely needed in many works of geological hazard survey, inspection, pre-warning and treatment of local landslides and collapses, and decision making for emergency response. However, current 2D or 2.5D GIS system cannot satisfy all these kinds of requirements and a 3D visualization and analysis system of geological...
Because of the continue progress of spatial data acquisition technology and the rich data collection methods, spatial data growth as explosive speed, so the research on spatial data storage models has become a breakthrough. In this paper the concept model of spatial data storage is abstracted into geometry layer, attribute semantic relationship layer and core layer, the former supplies the representation...
How to create high-performance true three-dimensional spatial index for the complicated geological scene to ensure the effective storage management and dispatching of the TB-class mass complicated geological scene data is one of the key technical issues of the 3DGIS, which needs to be resolved urgently. The inefficient space division and the high rate of index node overlap problems will appear in...
One issue of GIS is management of huge amount of spatial data. Nowadays, acquisition capacity of 3D spatial data with various scales and resolutions is much more convenient due to new 3D acquisition technologies. It is a difficulty that how to efficiently and synthetically organize and manage large scale underground 3D spatial data with contents of continuous distribution and nonuniformity. A 3D GIS...
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