Fuzzy mathematic vector regional evaluation method and apparatus
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A technology of fuzzy mathematics and evaluation method, applied in the field of geographic information system, which can solve the problems of inaccurate calculation results, complicated boundary division, and difficult to distinguish units.
Inactive Publication Date: 2016-07-06
GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
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[0005] 2. When converting vector data with obvious boundaries into raster data, the cells in the boundary part are not easy to distinguish. Even if the judgment is made according to the size of the area, there will be loss of original data
This also makes the calculation results of the elements on the boundary not accurate enough during calculation
as attached Figure 1 As shown, the division of the unit at the boundary between A and B is shown in the left figure. There will be units that span the A and B areas. In the past, it was judged which side the unit belongs to according to the size of the area, which will cause the original data to be lost. When multiple thematic maps are superimposed and calculated, the boundary division is more complicated, which will lead to a large deviation between the calculated results and the reality;
[0006] 3. At the same time, if the final superposition factor map is calculated manually, the amount of calculation is huge, and human errors are prone to occur
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Embodiment 1
[0068] The fuzzy mathematics vector partition evaluation method provided by the embodiment of the present invention, such as figure 1 shown, including the following steps:
[0069] 101. Determine an evaluation factor according to an evaluation purpose, and establish an evaluation database according to the evaluation factor.
[0070] Specifically, collect data for each evaluation factor and establish an evaluation database.
[0071] The evaluation database includes: factor set U={u 1 , u 2 , u 3 ,...,u m} and evaluation set V={v 1 , v 2 , v 3 ,...,v n}; where: m, n are natural numbers.
[0072] Specifically, the construction of the evaluation factors is carried out according to the following principles:
[0073] Prominence: Determine the issues to be highlighted according to the evaluation purpose of the evaluation object, and determine the decisive factors for the highlighted issues;
[0074] Systematic scientificity: The evaluation index system, as an organic whol...
Embodiment 2
[0179] Embodiment 2 of the present invention provides a fuzzy mathematical vector partition evaluation device, such as Figure 7 As shown, the device includes:
[0180] A database building module 71, configured to determine evaluation factors according to the evaluation purpose, and establish an evaluation database according to the evaluation factors;
[0181] The weight set building module 72 is used to determine the weight coefficients of each evaluation factor and set up a weight set;
[0182] A drawing module 73, configured to draw a thematic map of each evaluation factor according to the evaluation database;
[0183] Scale module 74, is used for carrying out scale to each evaluation factor, obtains the degree of membership value of comprehensive evaluation;
[0184] The comprehensive evaluation module 75 is used for spatially superimposing the thematic maps of each evaluation factor to obtain a comprehensive thematic map, processing the comprehensive thematic map to obt...
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Abstract
The invention discloses a fuzzy mathematics vector partition evaluation method and device, and relates to the technical field of geographic information systems. The method includes: determining evaluation factors according to the evaluation purpose, establishing an evaluation database according to the evaluation factors; determining the weight coefficient of each evaluation factor , establish a weight set; draw each evaluation factor thematic map according to the evaluation database; scale each evaluation factor to obtain the membership degree value of the comprehensive evaluation; carry out spatial superposition on each evaluation factor thematic map to obtain a comprehensive thematic map, and the The comprehensive thematic map is processed to obtain a comprehensive evaluation zoning map, and a comprehensive evaluation value is obtained according to the comprehensive evaluation zoning map. The invention uses the GIS platform to process and superimpose the graphic elements, so that the analysis results have clear boundaries; and the fuzzy mathematical analysis is used as the theoretical basis to make the analysis results more scientific.
Description
technical field [0001] The invention relates to the technical field of geographic information systems, in particular to a fuzzy mathematical vector partition evaluation method and device. Background technique [0002] At present, the comprehensive evaluation of spatial information-related objects is mostly carried out by the regional unit evaluation method, which can be divided into grid unit method division and vector unit method division. The division of the grid unit method refers to dividing the comprehensive evaluation area into exactly the same equal space unit modules, and approximately simulating the boundaries of the actual spatial attributes. The final comprehensive evaluation also belongs to the superposition calculation of all the factors considered, but the calculation method Most of them are calculated manually, using Excel spreadsheets and editing formulas for calculation. [0003] But above-mentioned method has following defective: [0004] 1. The division ...
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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/0002G06T2207/30181
Inventor 黄佳铭张庆华彭卫平钟林谢小荣
Owner GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
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