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Map display method, apparatus for controlling map display and navigation apparatus

A display method and map technology, applied in the field of navigation, to achieve the effect of saving computing resources

Active Publication Date: 2013-07-03
SHANGHAI PATEO ELECTRONIC EQUIPMENT MANUFACTURING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For more technical solutions on the navigation map display in the navigation device, please refer to the Chinese patent application document with the publication number CN1920807A titled "Digital Map Display Method", but the above problems still have not been solved.

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  • Map display method, apparatus for controlling map display and navigation apparatus
  • Map display method, apparatus for controlling map display and navigation apparatus
  • Map display method, apparatus for controlling map display and navigation apparatus

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Embodiment Construction

[0029] Aiming at the problems of the prior art, the inventor provides a map display method and a device for controlling the map display after research, which can use any point on the screen as the position of the current parking space, and after changing the position of the current parking space, based on the original parking space The screen coordinates of (map base point), the coordinate offset parameters of the map coordinates of the map object relative to the map coordinates of the map base point, and the transformation parameters determined according to the map rotation angle and the map scale factor convert the map coordinates of the map object into corresponding screen coordinates, allowing for faster redrawing of the navigation map and saving computational resources within the navigation device.

[0030] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be desc...

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Abstract

The invention relates to a map display method, an apparatus for controlling the map display and a navigation apparatus. The map display method comprises the steps of acquiring screen coordinates and map coordinates of a map base point; determining a rotation angel of the map; determining transformation parameters based on the rotation angel of the map and a proportionality coefficient of the map; determining coordinate offset parameters of the map coordinates of a map object in relative to the map coordinates of the map base point; transforming the map coordinates of the map object into corresponding screen coordinates of the map object based on the screen coordinates of the map base point, the coordinate offset parameters and the transformation parameters; and displaying the map containing the map object in a screen based on the screen coordinates of the map object. The technical solution provided by the invention can take any point on the screen as a position of a current vehicle parking spot and re-draw a navigation map faster when the position of the current vehicle parking spot is changed, thereby saving computing resource in the navigation apparatus.

Description

technical field [0001] The invention relates to the technical field of navigation, in particular to a map display method and a device for controlling map display. Background technique [0002] A navigation device based on a global positioning system (Global Positioning System, GPS) is widely used in the field of automobiles to provide navigation information for drivers. Usually, the functions of the navigation device include providing a map database to enable the display of the navigation device to display an electronic map, and obtaining the location of the car through a GPS receiver. During the driving process of the car, the navigation device will calculate the route according to the destination information and departure information input by the user and generate navigation information, or the navigation device can also calculate the route through the remote server connected to it, and the remote server will provide corresponding information after calculating the route. ...

Claims

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Application Information

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IPC IPC(8): G01C21/26G01S19/42
Inventor 王军
Owner SHANGHAI PATEO ELECTRONIC EQUIPMENT MANUFACTURING CO LTD
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