Research And Practice On The Visualization Method Of DEM Error

Visualization is an important method that analyses the constitution distribution and builds the accuracy model of DEM error, not only exhibiting different DEM errors by visual modes, strengthenning the people's comprehension and understanding degree of DEM error, but also expressing the relation of DEM error and influence factors, summarizing easily the property and regulation of DEM error, and controlling the quality of DEM data. From the visualization basis methods, researching the application of DEM accuracy through different technology of visualization analysis, the main content includes.(1) Concluding and summarizing the DEM error visualization of the theories method and the technology way, putting forward the method that making use of multi-dimensional data and visualizing a research the DEM accuracy model.(2) In order to avoid repeating the visualization method, improving the application of DEM accuracy analysis with visualization technology, this paper hackles newly the classification of the DEM error, which is the basis of researching the application laws and using characteristics with different visualization methods, and building a set of visualization system of DEM error.(3) Resolution and terrain factor are the basis of the paper, which are influence factors of DEM error, analyzing the influence of different factors for DEM accuracy by the visualization method, from two aspects of single error and total error, and improving or building the corresponding accuracy models.(4) On the foundation of the foregoing theory researches, combining the topic need, adopting the method of object-oriented to accomplish the design and realization of verification system.The research of this paper provides theories and technique reference for visualization expression of DEM error data, providing a method and an approach of constructing more complicated and consummate DEM accuracy models, the paper has the certain theories meaning and net value.