基于GDI+的数字地图符号设计

GDI Plus-based Design of Digital Map Symbols

GDI+对矢量绘制提供了很好的支持,支持无锯齿、渐变、梯度、混合、透明等各种图像效果。能够自定义线条样式,支持线头和线冒,能够设置线条拐角处的连接样式。GDI+这一系列的新特性,简化了矢量图形系统的开发,减小了地图符号系统设计的难度,提高了开发效率。本文通过对点线面符号构成的研究和分析,利用GDI+新的特性,设计出美观高效的点、线、面等地图符号。通过对比和实践得出该方法能满足一般地图制图对符号的需求,并且取得令人满意的显示效果。

GDI plus provides a good support for vector graphics drawing. GDI plus supports anti-aliasing, gradients, gradient, blending, transparency, and other image effects. It can customize the line style, set the cap styles for the start and end of a line, be able to specify how to join two lines that are drawn by the same pen and whose ends meet. These new features make development easier. In this paper, according to the research on point, line and polygon, we find a way to design these symbols. It makes the symbols look good and be drawn quickly.