Method and device for grading and coloring thematic map

A thematic map and map technology, applied in the field of grading and coloring of thematic maps, to achieve the effect of convenient operation for users, reducing the influence of human factors, and improving work efficiency

Inactive Publication Date: 2010-06-16
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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

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Example

[0026] Reference figure 1 , Shows the flow of the first embodiment of the method for hierarchical coloring of thematic maps of the present invention, which specifically includes the following steps:

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

[0028] Filter out the repeated attribute data in the map data and obtain the single value of the attribute data;

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

[0030] Take attribute data single value as the statistical object, count the number of occurrences of each single value, divide by the total number of occurrences of all single values, obtain the frequency of single value of each attribute data, and then get which attribute data section appears The frequency is relatively large, and which attribute data sections appear relatively less frequently, so that the distribution of thematic map attribute dat...

Example

[0035] Reference figure 2 , Shows the flow of the second embodiment of the method for hierarchical coloring of thematic maps of the present invention, which specifically includes:

[0036] Step 201: Extract the single value of the attribute data of the thematic map, draw the single value histogram of the attribute data, and obtain 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 histogram of the occurrence frequency of the attribute data single value of the thematic map, and obtain the distribution of the attribute data;

[0038] Step 203: According to the change trend and distribution of the attribute data, divide the attribute data into one or more data segments, and divide the thematic map into one or more levels according to the above data segments; where the attribute data is The frequency of each data segment is normally distributed;

[0039] Step 204: Set different colors f...

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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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IPC IPC(8): G09B29/10
Inventor 王瑛王静爱赵明媚
Owner BEIJING NORMAL UNIVERSITY
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