MapX下TrueType字体符号的扩展

Extension of TrueType Font Symbol under MapX

针对MapX点符号库的不足,在分析MapX内部数据结构和TrueType字体符号的调用机制基础上,结合TrueType字体文件的结构,提出了一种扩充MapX中TrueType字体符号库的方法。该方法可以根据GIS应用系统的具体需求定制符合要求的TrueType字体符号库,简单易行,开发周期短,丰富了基于MapX的GIS应用程序的TrueType字体符号库。

According to the deficiency of MapX point symbol library and analysis on MapX internal data structure and call mechanism of TrueType font symbol, a new extending method of TrueType font symbol in MapX is put forward by combining the structure of TrueType font file. The method can customize satisfactory TrueType font symbol base according to the specific needs of GIS application system. With the merits of simple, convenience and short development period, it can enriches the TrueType font symbol library of GIS application system based on MapX.