Research On The Key Technology Of Data Simulation System Based On QGIS

In the daily military exercises, the real-time data activity moving target and the sensor is difficult, generally do not have a reproducible and costly exercise, it is necessary to propose a new auxiliary data fusion system. Data simulation system is an auxiliary data fusion system algorithm debugging, algorithms, functional testing, performance assessment tools and algorithms. By manually set the story and scenario simulator probe parameters, data on the target system simulation model and the motion detection process simulation, static, or real-time data to generate simulation, validation algorithms and algorithms for effective performance evaluation.The data in the study and design of simulation system also encountered some problems, mainly the amount of the following aspects: the time for when the local vector map data in large quantities and large-scale operation in the user view the map, or vector map elements more complex, since the rendering engine is required each time the user operates the map to re-render all the elements within the entire screen, resulting in the rendering workload increased sharply, leading to the problem of slow refresh vector maps, vector maps of tile therefore propose to build and tile map server and piece constructed local map tile cache system to solve the problem of slow refresh vector map. In this paper, the map tile cache system proposed two alternative algorithms GLMFU and ALMFU algorithms, proven algorithm of the system cache hit rate has increased. When a large number of users for the simulation of a moving target and sensor simulation workload moving target, and the error sensor module, the corresponding operation can not be completed in time, lead to a software problem Caton phenomenon is not smooth, and based on this proposed CUDA-based simulation algorithm parallelization solutions. Proposed for moving objects, for the sensor and for evaluation of error three CUDA accelerated algorithm. By using CUDA technology to high-performance graphics computing power simulation system applied to the data, in order to enhance performance and user-friendliness of the data used in the simulation system.Through a detailed evaluation of the system, effective methods to verify the effect of several of the system performance of the proposed system speedup have a certain upgrade, upgrade speedup reached 1.9, and the need to continue research to improve the problem raised prospect.