松花江流域地势图晕渲配色方案及优化

Color Scheme and Optimization of Shading in Relief Map of Songhua River Basin

随着我国数字高程模型的建立和计算机绘图技术的发展,采用颜色渐变方式表达的晕渲地势图以立体感强、效果逼真等优点,越来越受到青睐。但目前对于晕渲的颜色设置并没有统一的量化规定,而不同的颜色量化直接影响晕渲图的效果和风格。作者在分析松花江流域地势的基础上,从平原、丘陵、高原、山地四个划分类别,论述颜色配置需要注意的问题,并按类别细化海拔区间,给出了颜色量化值,通过对颜色文件的测试和修改达到晕渲配色的方案优化效果。根据作者绘制松花江流域地势图的经历和地势效果,证明晕渲配色优化方案的可行性。

With the establishment of Digital Elevation Model(DEM)and the development of computer graphics technology in China,the shading map expressed by color gradient is more and more popular because of its strong three-dimensional sense and realistic effect.But at present,there is no unified quantitative regulation for the color setting of shading,and different color quantization directly affects the effect and style of shading.Based on the analysis of the terrain of Songhua River Basin,the terrain was divided into four categories:plain,hill,plateau and mountain.The problems of color setting were discussed,the altitude range was refined according to the category,and the quantitative value of color was given,so as to achieve the optimization effect of shading color matching scheme through the test and modification of color files.According to the author's experience in drawing the terrain map of Songhua River Basin and the terrain effect,the feasibility of shading color optimization scheme was proved.