Research On The Technology Of Electronic Sand Table Oriented In Path Planning

Electronic sand table, some called digital sand table or virtual sand table, is contrasted with traditional material sand table model. Unlike material sand table, electronic sand table is a new high-tech product with integration of computer application, geographical information system, virtual reality and multimedia. It can give users a real-time and interactive operation circumstance. With the development of computer technology, material sand table is now gradually substituted by electronic sand table.Path planning is to search the best flight track from start point to target point that can maximize survival probability and minimize sail distance according to terrain and enemy's situation and some other limits. The airplane's battle area is always very huge, so the path planning for the airplane plays an important role in completing mission. It is the key technology of the airplane mission planning system and the technology generate an optimal track to satisfy the airplane machine performance and war field environment under special, restrict condition.This paper not only introduces the design and realization scheme of the electronic sand table, but also presents the key technique of the technical scheme for the electronic sand table, such as data processing, terrain modeling, feature matching. What is more, based on digital elevation model (DEM) and satellite remote sensing image, we made the electronic sand table using the platform of ArcGIS. Finally, we can use the precise electronic sand table to represent the real surface features in the path planning and realize the function of Terrain Following/Terrain Avoidance and Threat Avoidance.