Cultivated land ridge coefficient estimation method and device based on geographically weighted regression model

Abstract

The invention relates to a cultivated land ridge coefficient estimation method and device based on a geographically weighted regression model and belongs to the technical field of cultivated land resource investigation. The method comprises steps of carrying out the calculation according to a quadrat distribution diagram based on an optical satellite image of a to-be-estimated region, and obtaining the ridge coefficient of each quadrat in the to-be-estimated region; based on the ridge coefficient of each sample and the slope data of each sample, constructing a ridge coefficient estimation model of each local cultivated land by adopting a geographically weighted regression method; performing spatial interpolation calculation according to the regression coefficient, the constant term and a regression residual error of each local cultivated land ridge coefficient estimation model to correspondingly obtain regression coefficient spatial distribution data, constant term spatial distributiondata and regression residual error spatial distribution data; and based on the distribution data and the gradient data of the to-be-estimated area, carrying out substitution calculation and cutting processing to obtain an estimated value of the farmland ridge coefficient. According to the method, the cultivated land ridge coefficient of the to-be-estimated area can be rapidly obtained, and spatial distribution heterogeneity of the ridge coefficient can be accurately represented.

Description

technical field [0001] The application belongs to the technical field of cultivated land resource investigation, and in particular relates to a method and device for estimating the ridge coefficient of cultivated land based on a geographically weighted regression model. Background technique [0002] Cultivated land is the basic natural resource for human survival and development, and an irreplaceable resource and agricultural production factor. With the continuous development of industry and the continuous progress of society, all walks of life are in urgent need of land, the area of ​​construction land is increasing year by year, a large amount of cultivated land is converted to other uses, and the area of ​​cultivated land is gradually decreasing. The most direct harm caused by the reduction of cultivated land is the food crisis. . Therefore, it is of great significance to pay attention to the protection of cultivated land and promote the harmonious coexistence between pe...

AI Technical Summary

Problems solved by technology

The traditional calculation method of cultivated land ridge coefficient requires a lot of manpower and material resources, and the time cost is high. The obtained cultivated land ridge coefficient is summarized according to the division and grouping, which cannot accurately reflect the heterogeneity of the field ridge coefficient in the spatial distribution.

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