Bitmap and vector graphics both have their uses in CBL, but usually in different circumstances.
Bitmap files tend to be large and difficult to edit, and they are also difficult to re-size.
However, they can be created easily with scanners of one kind or another and are the only sensible format for displaying photo-realistic images. Vector graphic files, on the other hand, are much more compact, can be edited and re-sized easily and are the best medium for diagrams and drawings. But they often require more skill to produce since they must be 'drawn'. Vector graphics can easily be converted into bitmaps, but the reverse is only really feasible for simple, monochrome bitmaps, such as logos.