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Map file format

A map file and format technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of slow running, occupation, and more memory of applications, and achieve the effect of reducing memory

Inactive Publication Date: 2011-01-26
SUZHOU NG NETWORKS
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  • Summary
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AI Technical Summary

Problems solved by technology

Many applications need to use 3D electronic maps in their calculations. These 3D electronic maps are usually stored in the form of grids and require a lot of memory
Especially for high-resolution 3D electronic maps, the amount of data often exceeds the usual memory capacity (about 2-4GB) of existing computers, so applications often run slowly due to memory overload

Method used

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  • Map file format
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Examples

Experimental program
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Embodiment Construction

[0022] see figure 1 , figure 2 As shown, a map file format, including the following files in the same directory:

[0023] A layer description file 1, the layer description file 1 is used to save the description information and setting content of the map;

[0024] A display file 2, the display file 2 is used to define the mapping relationship between data and color table;

[0025] An overview map file 3, the overview map file 3 is used to display the overview of the entire map;

[0026] And, at least one map block file 4, the map block file 4 is used to record block map information.

[0027] Further, the profile map file 3 is a bitmap file with a file extension of .BMP.

[0028] Further, the file extension of the layer description file 1 is ldf, which is a simple ASCII text file, which includes several sections, each section starts with the section name in brackets, for example: [mySection], each section Entries have the following format:

[0029] Item_name=(data_type)it...

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Abstract

The invention discloses a map file format. The map file format comprises a level description file, a display file, a general picture file and at least one map blocking file, wherein the level description file is used to store the description information and setting content of a map; the display file is used to define the mapping relationship from data to a color table; the general picture file is used to display the general picture of the entire map; and the map blocking file is used to record the blocked map information. By using the map blocking file format of the invention to store the blocked map information, the problem how massive map data are reasonably used under the premise of limited memory capacity can be effectively solved.

Description

technical field [0001] The invention relates to a file format, in particular to a map file format. Background technique [0002] With the popularity of computer applications, electronic maps are more and more widely used in various fields, including e-government, land planning, public security emergency, transportation, aviation, water conservancy, energy, surveying and mapping, forestry, tourism, communications, environmental protection, For military defense, real estate, etc., geographic information data represented by electronic maps has become an indispensable basic data in many information systems. Many applications need to use 3D electronic maps in computing, and these 3D electronic maps are usually stored in the form of grids, which require a lot of memory. Especially for high-resolution three-dimensional electronic maps, the amount of data often exceeds the common memory capacity (about 2-4GB) of existing computers, so the application program often runs slowly due t...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 黄学民
Owner SUZHOU NG NETWORKS
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