bit map

The difference in close-up between a bit-mapped and vector font. As separate sets of bit maps are required for each different type size, scaleable vector graphics (outline) is the preferred medium for fonts.

In computing, pattern of bits used to describe the organization of data. Bit maps are used to store typefaces or graphic images (bit-mapped or raster graphics), with 1 representing black (or a colour) and 0 white.

Bit maps may be used to store a typeface or font, but a separate set of bit maps is required for each type size. A vector font, by contrast, can be held as one set of data and scaled as required. Bit-mapped graphics are not recommended for images that require scaling (compare vector graphics – those stored in the form of geometric formulae).