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Method and device for grading and coloring thematic map

A thematic map and map technology, which is applied in the field of grading and coloring of thematic maps to reduce the influence of human factors, facilitate user operation, and improve work efficiency.

Inactive Publication Date: 2012-06-27
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a grading and coloring method for thematic maps, which can solve the problem in the prior art that the grading process is completely completed by users based on experience, and reduce human factors in the process of making thematic maps

Method used

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  • Method and device for grading and coloring thematic map
  • Method and device for grading and coloring thematic map
  • Method and device for grading and coloring thematic map

Examples

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no. 1 example

[0026] refer to figure 1 , which shows the process of the first embodiment of the method for grading and coloring thematic maps according to the present invention, which specifically includes the following steps:

[0027] Step 101: extracting the single value of thematic map attribute data;

[0028] Filter out the duplicate attribute data in the map data to obtain the single value of the attribute data;

[0029] Step 102: Count the occurrence frequency of each attribute data single value to obtain the distribution of thematic map attribute data;

[0030] Take the single value of attribute data as the statistical object, count the number of occurrences of each single value, divide by the total number of occurrences of all single values, and obtain the frequency of occurrence of each single value of attribute data, and then obtain which attribute data segments appear The frequency is relatively large, and which attribute data segments appear relatively less frequently, so that...

no. 2 example

[0035] refer to figure 2 , which shows the flow of the second embodiment of the method for grading and coloring a thematic map according to the present invention, specifically including:

[0036] Step 201: Extracting the single value of the attribute data of the thematic map, drawing a histogram of the single value of the attribute data, and obtaining the change trend of the single value of the attribute data;

[0037] Step 202: Count the occurrence frequency of each attribute data single value, draw a frequency histogram of the attribute data single value occurrence frequency of the thematic map, and obtain the distribution of the attribute data;

[0038] Step 203: Divide the attribute data into one or more data sections according to the changing trend and distribution of the attribute data, and divide the thematic map into one or more levels of ranges according to the above data sections; wherein, the attribute data is in The frequency of occurrence of each data segment is...

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Abstract

The invention provides a method and a device for grading and coloring a thematic map. The method comprises the following steps: extracting a single value of the attribute data of the thematic map; counting the frequency of occurring each single value of the attribute data to acquire the distribution condition of the attribute data of the thematic map; dividing the attribute data into one or more data sections according to the distribution condition and diving the thematic map into a range with one or more levels according to the data sections; and setting different colors for the range with different levels of the thematic map to perform layer render. According to the distributing rules of the attribute data in a characteristic analysis region of the thematic map, adjacent parts are merged to form a plurality of data sections, the grading of the map data is further realized, and the influence of personal factors in the grading and coloring process can be reduced to a greater degree. Therefore, the generated thematic map can make the characteristics and the distributing rules of the attribute data more prominent.

Description

technical field [0001] The invention relates to the technical field of geographic information systems, in particular to a method and device for grading and coloring a thematic map. Background technique [0002] Geographic Information System (GIS, Geographic Information Systems) is a technology that integrates computer graphics and databases to store and process spatial information. It organically combines geographic location and related attributes, and integrates spatial information and its Attribute information is output to users accurately and authentically, with pictures and texts, meeting the requirements of urban and rural construction, enterprise management, and residents' life for spatial information. With the help of its unique spatial analysis and visual expression functions, various auxiliary decision-making can be carried out. [0003] The thematic map is a specific application map that the GIS system determines the display style of the map window based on the dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B29/10
Inventor 王瑛王静爱赵明媚
Owner BEIJING NORMAL UNIVERSITY
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