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Gray Geographical Information System—the Theory and Technology of Correct Geological Spatial Data Dynamically

MAO Shanjun (Institute of Remote Sensing & GIS of Peking University,Beijing,China,100871)  
Concept of GGIS(Gray Geological Information System),together with integrated data model and data structure of 2D\|GGIS and TIN,of 3D\|GGIS and ARTPN(Analogical Right Triangular Prism Network) are therefore put forward in the paper.It lays a basis for realizing geological data dynamic management.Moreover,the key technology of automatically creating TIN and ARTPN is discussed.
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