粤港澳大湾区地形图

三维地形图以晕渲底图叠加等高线和等深线的形式表达。其中晕渲底图用Surfer软件编制，选择合适的纵向比例和光照角，以凸显地形的起伏；叠加不同的配色显示不同的高程和水深。等高线和等深线的设置根据海陆和地势陡缓分别设置。陆区仅显示200m等高线；海区水深浅于20m的海域显示2m、5m和10m等深线；水深大于20m小于200m的海域等深线间距为20m；水深大于200m小于500m的海域等深线间距为100m；水深大于600m的海域等深线间距为200m。

3D topographic maps are rendered by overlaying contour lines and bathymetric lines onto a shaded relief base map. The shaded relief base map is compiled using Surfer software, with appropriate vertical scaling and illumination angles selected to accentuate topographic relief; different color schemes are overlaid to represent varying elevations and water depths. The settings of contour lines and bathymetric lines are adjusted separately based on land-sea distribution and terrain steepness. Only the 200m contour line is displayed on land areas; for sea areas with water depth shallower than 20m, the 2m, 5m, and 10m bathymetric lines are shown; for sea areas with water depth ranging from 20m to 200m, the interval between adjacent bathymetric lines is 20m; for sea areas with water depth ranging from 200m to 500m, the interval between adjacent bathymetric lines is 100m; for sea areas with water depth greater than 600m, the interval between adjacent bathymetric lines is 200m.

搜集汇总

背景与挑战

背景概述

该数据集是2019年粤港澳大湾区的三维地形图，以图片形式呈现，空间分辨率为百米级，适用于省级尺度分析。它通过晕渲底图叠加等高线和等深线，详细表达地形起伏和水深变化，主要用于海洋地质学研究，数据完全开放共享。