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无线电电磁态势图是依据区域有限采样点形成的整个区域无线电分布的趋势图,是研究区域无线电信息分布的重要方法。利用有限点获取整个区域的分布状态在GIS中主要使用空间插值算法,此法易产生估计误差。在采样点确定的情况下,依据无线电路路测数据空间分布特点,提出了一种将曲面样条插值算法应用于态势图生成的方法,并对算法进行了改进。实验表明:本算法精度比传统算法精度高,证明了算法的有效性,利用本算法可减少测量外业,节约成本提高效率。
The radio electromagnetic state diagram is a trend chart of the radio distribution of the whole area formed according to the limited sampling points of the area and is an important method for studying the distribution of the radio information in the area. The use of finite points to obtain the distribution of the entire region in the spatial interpolation algorithm is mainly used in GIS, this method is easy to produce estimation error. According to the spatial distribution characteristics of the drive test data, a method of applying the surface spline interpolation algorithm to the situation graph is proposed and the algorithm is improved when the sampling points are determined. Experiments show that the proposed algorithm has higher accuracy than the traditional algorithm, which proves the effectiveness of the algorithm. This algorithm can reduce the field measurement, save costs and improve efficiency.