基于细化地表模型的地表长度测量方法改进

IMPORVEMENT OF SLANT DISTANCE MEASUREMENT METHOD BASED ON DETAILING SURFACE MODEL

基于不规则三角网的数字地形分析原理,提出了线状地物的地表长度测量方法,针对该方法中平坦三角形引起的测长误差,引入了细化地表模型,对三种地形分别进行改进,并通过理论误差分析和长城长度测量试验,验证了该改进方法的可行性和精度。

Based on triangluar irregular network（TIN） terrial analysis principle,the slant distance measurement method of line feature is proposed.For the distance measurement errors caused by ＂flat triangles＂,the detailing surface model is suggested to improve the method.By the theoretical error analysis and experiments of Great Wall slant distance measurement,the feasibility and precision are analysed.