The software to calculate FID values using Avenue language based on Arcgis system was programmed, and then through practical calculation ofFID and its conversion mathematical relationship analysis under different contour-line interval in Baishuixi watershed, the results indicated that the FID can not only be used as the integrative and scientific measurem.
首先论述了以地理信息系统(GIS)为平台,基于分形信息维数(FID)表征地貌形态特征的原理和方法,采用Avenue语言开发了基于ArcGIS环境下地貌形态特征FID计算软件;并以长江流域白水溪小流域为例,进行了不同等高距下地貌形态特征FID的计算,通过对FID与等高距耦合关系的深入分析,结果表明:基于FID不仅可以对流域地貌形态特征进行宏观性、综合性定量表征,而且能够实现不同等高距下流域地貌形态特征的相互转换,有利于与流域形态特征相关联的水文、水土流失过程的动态模拟,同时可实现对现有地形数据的充分挖掘,填补我国大比例尺基础地理信息数据不足的缺陷。
The principle of equal-distance and equal-height electromagnetic distance measurement for triangulated height surveying is introduced in this paper.
介绍了等距等高电磁波测距三角高程测量的原理,详细深入地分析了这种高程测量方法的精度,通过计算和作图表示,可直观地反映在不同条件下的精度变化情况,讨论了代替国家等级水准测量的范围和条件,可供生产实际和进一步研究参考。
Research on contour lines automatic processing in digital topographic survey;
数字地形测量等高线自动处理问题探讨
The grid-fractionizing model based on the reconstructed contour lines;
基于重构等高线的格网细化模型
The modeling and analysis of accuracy for LOD model based on reconstructed error of contour lines;
基于等高线重构误差的LOD建模及精度分析
The research of draw contour by the general digital image to making use of the DLT algorithm;
利用DLT算法实现普通数码影像绘制等高线方法研究
Contour paradox and modification of contour definition;
等高线悖论及等高线定义的修改
Implementation and application of voltage contour based on Arc/info;
基于Arc/info的电压等高线的实现及应用