Map data, storage medium, and electronic apparatus
A technology of map data and link data, applied in the directions of maps/plans/charts, instruments, road network navigators, etc., can solve problems such as hindering access to required information, adverse effects on performance processing time, etc.
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[0030] Embodiments will be described with reference to the drawings.
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[0032] The map data of this embodiment is installed in a navigation system (navigation device) mounted on a vehicle. Such as figure 1 As shown in , the map data consists of groups of data files. The set of data files includes data files determined by subdividing the mapped area into a plurality of grids, and is hereinafter simply referred to as a set of grid-based data. The set of data files also includes an administrative data file that manages the grid-based data set.
[0033] A mesh is defined as the result of subdividing a rectangular area containing the mapped area. For each grid, the management data file stores information on whether there is grid-based data corresponding to the grid in the rectangular area. Grid-based data stores information about road networks in the grid (road information). Grid-based data is arranged in the map data in an order corresponding to the array of the gri...
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