In this paper, study on organization、storage and visualization of the massive terrain dataset.By building mass DEM terrain multi resolution model to organization the data,using data engine to store and dispatch the large-scale terrain data. Design the visualization system of the South Mountains and North Mountains in LanZhou city on these rationale.The system haves the functions
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Terrain 3D visualization technology is a key technology in the Virtual Reality, 3D Geographic Information System field and so on. It has a wide application in the flight-simulators, 3D video games, electronic sand table etc. Because of the variety and complexity of the terrain, the information of real terrain is very large, current computer can
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Texture technology has immerged in each aspect of the society as the developing of science.With the increasing of requirement,partially simulation of battlefield can not satisfy all users’ requirements any more,It is important to establish the global virtual terrain system,the organization and pretreatment of the global multi-resolution photos is always one of the key works.The command’s
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When the advent of major geological disaster and severely damaged in the project of lifeline, it is very important to fast position where the disaster occurred, to analyze how extent is the disaster and to translate the aid material to disaster region. And to do these above fast, we need the supporting of emergency geographical
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3D GIS is employed in an increasing number of applications. Compared to traditional 2D GIS, 3D GIS reflects the information of the real geographic environment better. It provides more friendly ways for interaction and has capabilities of analyzing 3D spatial information. 3D GIS is becoming the hot reaseach field of current GIS study and it
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With the development of DE (Digital Earth) and GIG (Global Information Grid), how to implement a global virtual terrain environment has caught attention of scholars, and till now there are still many challenging problems in the air. Among these, is how to balance the overload between visual fidelity and real-time rendering, which is caused by
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The paper studies the theory and algorithms of space information fusion and visualization and focuses on the theory and implementation process of the key techniques and algorithms such as intelligent selection of multi-source remote sensing image fusion method, efficient organization and management of massive terrain data, real-time rendering of terrain data, efficient and accurate rendering
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Question Answering is an important field of Information Retrieval research. Definitional Question Answering is an important branch of Question Answering, which extracts definitional sentences from open (special) document field with placed target. Both categories and properties, and description methods of concept are numerous,so there is big difference between expressions of explanatory text, then it is
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Question Answering is an important field of Information Retrieval research. Definitional Question Answering is an important branch of Question Answering, which extracts definitional sentences from open (special) document field with placed target. Both categories and properties, and description methods of concept are numerous,so there is big difference between expressions of explanatory text, then it is
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