Navigation electronic map data storage method and display method based on the storage method
An electronic map and display method technology, which is applied to road network navigators, maps/plans/charts, instruments, etc., can solve the problems of rough graphic detail description and long response time, so as to beautify the map interface, speed up the movement, and quickly Effects of graphic display and roaming
Active Publication Date: 2011-12-28
LINKTECH NAVI TECH
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[0004] The invention provides a navigation electronic map data storage method and a display method based on the storage method, which solves the problems of long response time in the map switching process and rough description of graphic details in the prior art
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[0025] In order to facilitate those skilled in the art to understand and implement the present invention, embodiments of the present invention are now described with reference to the accompanying drawings.
[0026] The navigation electronic map data of the present invention includes all the road information data in the map and all other data except the road data. Attach all data other than road data, such as green space, water system or buildings.
[0027] like figure 1 As shown, the storage method of the navigation electronic map data of the present invention comprises the following steps:
[0028] 1) Process the road data in the collected electronic map;
[0029] 2) forming a collection of processed road data into an atlas;
[0030] 3) The data of the atlas is made into multiple data files with different scales and independent of each other, and each scale corresponds to at least one benchmark display level;
[0031] 4) in each of the described data files, the target who...
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The invention provides a navigation electronic map data storage method and a display method based on the same. The display method comprises the following steps of: obtaining a display range; determining a proportional scale according to the display range; determining a map sheet contained in the display range; reading data of the map sheet into a foreground display area memory, and displaying the map sheet; reading data of a brother map sheet of the displayed map sheet into a background memory buffer area; moving a display window, moving the data in the background memory buffer area into the foreground display area for display; and reading the data of the brother map sheet of the displayed map sheet into the background memory buffer area. In the storage method and the display method provided by the invention, a storage mode of using map sheet node tree is used, so that graph details can be described in detail without considering a series of problems of reaction speed caused by huge data volumes; multi-proportional-scale adaptive variation of the map data is implemented, and map interface is beautified; a virtual display buffer area and a foreground and background dual-process mechanism are built, map movement speed is greatly accelerated, and rapid graphical display and roaming are implemented.
Description
technical field [0001] The invention relates to the field of electronic maps, in particular to a navigation electronic map data storage method and a display method based on the storage method Background technique [0002] In the prior art, the electronic map data display method mainly includes the following steps: first, read all data in the entire graphic range into the memory; then traverse all the data to determine whether each data is within the range included in the display window , if it is within this range, then display the data directly, if not, give up the data and continue to judge. [0003] In the process of applying the above-mentioned prior art, the user gradually discovered that the above-mentioned display method has some defects: firstly, due to the need to strive for a shorter response time, the amount of data required by the method must not be too large, which requires Control the amount of data displayed during display, which will inevitably describe the ...
Claims
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Inventor 陈小平韩宝成
Owner LINKTECH NAVI TECH