contour-line interval

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