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Rainfall interpolation analysis method based on weight optimization and inverse distance weighting

A technology of inverse distance weighting and interpolation analysis, applied in the field of geographic science, can solve the problems of sudden change in interpolation result gradient, weak extrapolation ability, and reducing the spatial difference of interpolation results, etc.

Inactive Publication Date: 2015-08-26
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0003] However, the traditional inverse distance weighting method has certain drawbacks in its application
Specifically, when the weighted power exponent is small (less than 2), a smoother spatial surface can be generated between known sample points, but it is easily affected by known points farther away, thereby reducing the spatial variability of interpolation results
With the increase of the weighted power index, the influence of known information farther away on the interpolation point is weakened, but it leads to a sudden change in the gradient of the interpolation result between known points, making its extrapolation ability weak

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  • Rainfall interpolation analysis method based on weight optimization and inverse distance weighting
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  • Rainfall interpolation analysis method based on weight optimization and inverse distance weighting

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[0083] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0084] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are to distinguish two entities with the same name but different parameters or parameters that are not the same, see "first" and "second" It is only for the convenience of expression, and should not be construed as a limitation on the embodiments of the present invention, which will not be described one by one in the subsequent embodiments.

[0085] Refer to attached figure 1 , is a schematic flowchart of an embodiment of the rainfall interpolation analysis method based on weight optimization and inverse distance weighting provided by the present invention.

[0086] The rainfall interpolation analysis met...

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Abstract

The invention discloses a rainfall interpolation analysis method based on weight optimization and inverse distance weighting, which comprises the steps of acquiring and processing rainfall basic data; selecting a reference point; simulating a weight distribution; evaluating and determining a power exponent; adjusting a weight calculation distance; evaluating and determining a weight optimization index; calculating the distance; adjusting the distance; simulating the weight distribution again; and calculating and evaluating the interpolation. The rainfall interpolation analysis method based on weight optimization and inverse distance weighting effectively prevents problems of relatively low spatial gradient of the interpolation result and easy interference by long-distance known points in a traditional inverse distance weighting method, and obtains an ideal spatial interpolation result.

Description

technical field [0001] The invention relates to the field of geographical science, in particular to a rainfall interpolation analysis method based on weight optimization and inverse distance weighted interpolation. Background technique [0002] Spatial data interpolation methods are widely used in the acquisition of geospatial data. The specific principle is to use limited spatial sample information to estimate unknown geospatial features. Inverse distance weighted interpolation is a common spatial data interpolation method. Because of its simple principle and efficient calculation, it is widely used to obtain spatial element information, such as rainfall, groundwater level, elevation and temperature. [0003] However, the traditional inverse distance weighting method has certain disadvantages in its application. Specifically, when the weighted power exponent is small (less than 2), a smoother spatial surface can be generated between known sample points, but it is easily ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/26
Inventor 杨中文许新宜陈建楠豆俊峰
Owner BEIJING NORMAL UNIVERSITY
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