A 3D geographic scene simulation method for virtual emergency drills

Abstract

The invention relates to a three-dimensional geographical scene simulation method for virtual emergency exercises. The method comprises the steps of: obtaining elevation data in DEM by using GIS software, and interpreting earth surface appendage information by using a registered high-resolution remote sensing image, or obtaining surface features and land utilization information by using an existing measured drawing; then, establishing topography and landforms by using the information with true geographic meanings in a game engine, wherein a key technical process is the conversion between a rectangular coordinate system in the game engine and a geographic coordinate system in the GIS software; at last, combining and reconstructing a three-dimensional terrain and geographic element model with true geographic meanings on a game engine platform, and achieving establishment of a realistic three-dimensional scene. The three-dimensional geographical scene simulation method virtual emergency exercises is convenient to operate and unnecessary to limit shape and size of the area, ensures elevation accuracy of DEM, and can automatically generate the three-dimensional science with the true geographic meanings.

Description

technical field [0001] The invention relates to a three-dimensional geographic scene simulation method for virtual emergency drills. Background technique [0002] Since its birth in the 1980s, serious games have been widely used in various fields such as military affairs, medicine, education, and scientific research. A serious game is a game that is not intended to be entertaining. The key difference between a serious game and a recreational game is whether the game is realistic and scientific. Serious games can be used to simulate some accidents and disasters that may occur in reality, such as earthquakes, fires, subway anti-terrorism, etc., and users can enter these game scenes in the form of any role to experience the process of accidents personally. In order to achieve the purpose of education and training for users. Therefore, serious games have been widely used in emergencies and emergency deduction, and are currently a research hotspot in this field, and will also ...

AI Technical Summary

Problems solved by technology

[0008] ①The operation is cumbersome;

[0009] ② It is necessary to adjust the geographic location of each block in the engine so that each block can be seamlessly connected, and this method will cause seam errors between blocks;

[0010] ③The generated 3D scene has no real geographical meaning and no original coordinates

[0013] ②Using the gray value to represent the elevation value, divide the elevation of the area into 256 levels, 0 means the lowest, and 255 means the highest. For such elevation data, the error of the three-dimensional terrain will increase with the increase of the relative height difference. 1000 meters The height difference can reach nearly 4 meters, which cannot meet the needs of actual drills (such as emergency evacuation);

[0014] ③The generated 3D scene does not have real geographical meaning

[0015] In view of the shortcomings in the above two methods, the purpose of the present invention is to solve the problems in the above two methods that the production steps are cumbersome, the data sources are limited, and the three-dimensional geographical scene with real geographical significance cannot be constructed in a real sense.

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