﻿ 柳州市数字山地图的设计与编制

# 柳州市数字山地图的设计与编制Design and Compilation of Digital Mountain Map in Liuzhou

Abstract: To study the distribution of mountains in small and medium-sized areas, slope, elevation and undulation are used as index to gradation calculation and modification of quantitative indicators for mountainization by the method of combining digital mountain and remote sensing in Liuzhou City, and with the support of ARCGIS software, it will map Liuzhou City Digital Mountain. The area of the mountainous area in Liuzhou City is approximately 1403.44 km2, accounting for 75% of the city’s land area. From the result map, we can see that the southeastern coastal area of Liuzhou City is dominated by small and medium-sized rolling hills and hills; in the southern part, the terrain is flat, and most of the elevations do not exceed 240 m. It is a densely populated area of urban population and the north, especially in the northwest. In the area, due to the fact that it is located on the edge of the Yunnan-Guizhou Plateau, it is dense with mountains and high elevations. The degree of undulation and slope is relatively large.

1. 引言

2. 理论基础

Figure 1. Liuzhou City digital mountain map production flow chart

3. 研究区概况与数据简介

3.1. 研究区概况

3.2. 数据简介

DEM数据是数字山地图定量分析的数据基础，是由美国太空总署(NASA)和国防部国家测绘局(NIMA)联合绘制得到，并于2002年成功绘制完成，用于海拔、起伏度以及坡度的计算。柳州市SRTM-DEM

Table 1. Mountain map rating system

Figure 2. Liuzhou DEM data map

4. 数据处理

4.1. 数据预处理

Figure 3. Liuzhou City Slope Information

4.2. 山地图制作

4.2.1. 坡度信息提取、起伏度信息提取与信息统计

$\text{slop_degrees}=\text{ATAN}\left(\sqrt{\left({\left[\text{d}z/\text{d}x\right]}^{2}+{\left[\text{d}z/\text{d}y\right]}^{2}\right)}\right)\ast 57.29578$ (1)

$\left[\text{d}z/\text{d}x\right]=\left(\left(c+2f+i\right)-\left(a+2b+g\right)\right)/\left(8\ast x\text{_}cell\text{_}size\right)$ (2)

$\left[\text{d}z/\text{d}y\right]=\left(\left(g+2h+i\right)-\left(a+2b+c\right)\right)/\left(8\ast y\text{_}cell\text{_}size\right)$ (3)

Figure 4. Liuzhou City relief degree of land surface

${R}_{i}={H}_{\mathrm{max}}-{H}_{\mathrm{min}}$ (4)

4.2.2. 山地图配色方案、符号系统设计与标注附图

Figure 5. Percentage of land area occupied by each elevation

Table 2. Color design standard

4.2.3. 版面设置

Table 3. Mountain shape symbol

Figure 6. Map layout settings

Figure 7. Liuzhou city digital mountain map

5. 结论

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