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Map display method for geographic information system

A technology of geographic information system and display method, which is applied in the field of map display method and display device of geographic information system, can solve problems such as sense of pause, slow response speed, etc., and achieve improved smoothness, no visual delay, and fast map display speed Effect

Inactive Publication Date: 2018-11-23
安徽迈普德康信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the map display method in the prior art is prone to technical defects of visual pause and slow response when the user uses the device.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] A map display method of a geographic information system, comprising the following steps:

[0021] (1) When the system starts, create a map file linked list cache, two virtual screen caches and a map data cache, the two virtual screen caches include a front cache and a background cache, and the two virtual screen caches are larger than the actual screen ;

[0022] (2) Retrieve all map data files under the specified path of the memory card, extract the most basic header information of each map data file, and link them through the memory linked list to form a map data file chain; When judging the type, it is directly based on the map file linked list cache in the memory;

[0023] (3) Use the default center coordinates, display level and map data type to quickly judge the geographic range and map type of the file linked list, and read the geographic data file covered by the current screen range from the memory card into the map data cache and provide it to the front cache ...

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PUM

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Abstract

The invention discloses a map display method for a geographic information system. The method comprises the step of establishing a map file linked list cache, two virtual screen caches and a map data cache. The invention also provides a map display device for the geographic information system. Through application of the technical scheme provided by the invention, a traveler is facilitated, practicability of a smart terminal is improved, and moreover, visual experience of a smart terminal user is improved.

Description

technical field [0001] The invention belongs to the technical field of electronic maps, and in particular relates to a map display method and a display device of a geographic information system. Background technique [0002] Electronic maps are maps that are stored and consulted digitally using computer technology. The electronic map can be built into a terminal, such as a mobile phone or a notebook, and is easy to carry and has powerful functions; at the same time, when the scale of the map is enlarged, reduced, and rotated, the display effect will not be affected, and it is easy to be favored by the majority of users. An indispensable good helper. At present, smart terminals on the market, such as smart phones, handheld computers, personal network access devices, and personal computers, all have positioning functions. You can also view the distance between your own geographical location and the destination, travel routes, etc., which facilitates the user's travel. Howev...

Claims

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Application Information

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IPC IPC(8): G06F17/30G09B29/10
CPCG09B29/10
Inventor 许庆刚朱继远黄健王莉
Owner 安徽迈普德康信息科技有限公司
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