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The shortest path to the destination should be computed
with respect to time and distance.
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The application should be easy enough to understand and
operate for a general user.
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The database of the system should be comprehensive and
up to date so that each route and street of any area should
be included in the results produced by the mobile device.
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The central database to which the mobile GIS connect via
satellite is updated regularly on periodic and event driven
basis.
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