| 摘要 |
A navigation device is provided for improving the visibility of a map image including facility information. A map drawing section 14 generates map drawing data for the display of the map image by applying a predetermined scaling factor, and stores the data in the VRAM 16. A facility mark drawing section 22 extracts a predetermined facility from the drawing range of the map image, draws a facility mark corresponding to the facility with its display pattern changed in response to the scaling factor of the map image, and stores the drawing data in the VRAM 16. An image superimposing section 36 merges the drawing data stored in the VRAM 16 and the drawing data provided by an auxiliary image drawing section 34 and the like, to provide the merged data to a display device 6. Based on the drawing data provided by the image superimposing section 36, the map image with the facility marks superimposed thereon is displayed on the screen of the display device 6.
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