Gradient map for navigation, gradient map generation method and navigation device

Abstract

A gradient map for navigation is converted from an original map which presents most major road information and most secondary road information. The gradient map comprises a reservation block and an adjustment block, the reservation block presents part of major road information and part of secondary road information in the original map, the adjustment block surrounds the reservation block and presents the major road information, unpresented in the reservation block, in the original map, a map scale of the adjustment block is larger than that of the reservation block, and at least one major road in the reservation block is connected with a corresponding major road in the adjustment block. Since the reservation block presents the major road information and the secondary road information at the same time, the adjustment block with large map scale only presents the major road information, and major roads at the junction of the reservation block and the adjustment block are jointed, favorable map information linkup performance is realized.

Description

【Technical Field】 [0001] The present invention relates to a map, in particular to a gradual map used for navigation and simultaneously presenting different levels of map information and road information in the map. 【Background technique】 [0002] Generally, the map will present different levels of map information and road information according to the scale. In the case of a larger scale, the map presents a wider map range, but the map range is less detailed. For example, only major roads are presented without secondary road information such as streets and lanes. In the case of a smaller scale, the map presented on the map is smaller and the map information is more detailed. In addition to the main roads, streets and lanes are also displayed. However, when viewing such a conventional map, the user must switch the scale of the map from time to time to obtain the required map information, and the operation procedures are relatively complicated. [0003] Therefore, China Taiwan Paten...

AI Technical Summary

Problems solved by technology

However, the partially enlarged map of this kind of digital map is presented in the form of a pop-up window. The partially enlarged map will cover a part of the original map, and its display position does not correspond to the enlarged area in the original map, and the roads displayed on the partially enlarged map cannot be connected. The road displayed on the original map affects the intuitiveness of viewing the road

If this kind of digital map is used in the navigation device, the smoothness of driving will be affected due to the poor connection between the map information and the road information.

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