VECTOR-BASED COMPUTER GRAPHICS IN AUTOMATED MAP COMPILATION

This paper describes a computer-assisted mechanism for constructing line and area symbols on maps. Vector-based computer graphics techniques such as hatching and clipping are extended for this purpose. In an effort to enhance visually the perception levels of line and area symbols, filling and following algorithms are used to place basic symbols on line and area symbols. Filling and following densities can be modified easily by changing input parameters, affording the cartographer freedom in symbol design and use