Patent ID: 8350873
Filing Date: 2013-01-08
Classification: G01C,G06F,G06T

Abstract:
1. A method of controlling a navigation system comprising: inquiring if the navigation system is displaying a road map in a first map scale on a display; concluding that the navigation system is displaying the road map in the first map scale on the display; inquiring if a scrolling feature (panning feature) was used prior to concluding that the navigation system is displaying the road map in the first map scale to pan the road map in the first map scale on the display to a specific scrolled point; concluding that the scrolling feature was used prior to concluding that the navigation system is displaying the road map in the first map scale to pan the road map in the first map scale on the display to a specific scrolled point; calculating a detail road display area based on the specific scrolled point of the display; loading detailed road link data in a second map scale greater than the first map scale from memory of the navigation system, the detailed road link data corresponding to the calculated detail road display area; determining if the detail road link data will fit on the display; converting the detailed road link data from the second map scale to the first map scale to create converted detail road link data only after determining that the converted detail road link data will fit on the display; and displaying the converted detail road link data in the first map scale on the display together with the road map in the first map scale when it is determined that the detailed road link data will fit on the display.