A navigation apparatus, and method, comprised of an input unit, central processing
unit, output unit, locator, processing devices, computing and retrieving devices,
and storage unit. The navigation apparatus and method computes or retrieves and
outputs or displays a unit area not suitable for travel, that is, a "cell", from
a destination, based on, for example, a type of moving object or data of a navigated
area. The navigation apparatus and method thereby presents cells as realistic,
useful, basic information based on various travel factors and enables such cells
to be avoided and the destination to be reached.
