In order to timely and accurately understand the spatial and temporal distribution and rainfall intensity in a region to meet the demand of practical work, the rainfall isoline should be mapped by computer technology with the rainfall data of relevant rainfall station in the region. Under the CAD environment, the coordinate and rainfall data file of the stations in special region can be generated by VFP database programming language, then, with the rainfall isoline generated by CASS graph software and relevant base map, the regional rainfall isoline can be generated. In the combination of the practical condition of Zhenjiang City, Jiangsu Province, this paper gives a detail introduction to this technology. The practical application shows the generated rainfall i-soline map is satisfactory with good universality.%为了及时准确地了解某个区域、某个时段内的降雨时空分布和强度,以满足实际工作的需要,需要根据该区域内相关雨量站点的雨量数据采用计算机技术绘制降雨量等值线. 在CAD环境下,利用VFP数据库编程语言编程生成给定范围内的站点坐标雨量数据文件,再利用CASS成图软件生成雨量等值线,配上相关区域的底图即可生成区域降雨量等值线的过程. 结合江苏省镇江市的实际情况,对这一技术进行了详细的介绍. 实际应用表明,成图效果较好,有较强的通用性.
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