Vector- vs. bit-based graphic-data storage

The pros and cons of bit-based versus vector-based graphics are discussed in terms of their appropriateness for certain computer-aided design and computer-aided engineering (CAD-CAE) applications, and the principal difference is that vector-based files store only the starting and ending points on a line, while bit-based files retain every pixel. Bit-based packages are easier to use and provide more accurate displays, though they cannot accommodate extremely complex drawings due to the large memory required for storage. Though vector displays do not pan smoothly, or display as accurately, they store descriptions of arcs more accurately, and by using a photo-plotter, a smooth arc can be produced. Applications for analog pc-board design require vector-based graphics, while bit-based displays are needed for CAE because of the convenient tools and the ability to provide attractive documents. There are packages which offer the best features of both bit- and vector-based displays.