Abstract:Based on previous research results, this paper gives the derivation details of theoretical calculation process of the weather radar shielding angle chart and the range chart, points out deviations in azimuth, elevation, slant distance, etc. in previous calculations, and gives the solutions. According to the theory proposed in this paper, the shielding angle chart and range chart are drawn by using geographic information data, and are compared with the actual radar echo chart. The comparison results show that, except for the individual deviation caused by the resolution of geographic information,the theoretical calculation chart is overall consistent better with the actual radar echo chart.