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Crop distribution map

A technology of spatial distribution maps and crops, applied in the field of data analysis, can solve problems such as difficulty in reflecting the spatial differences of crops within a statistical unit, difficulty in obtaining spatial distribution information of the entire crop series at a large regional scale, and consuming a large amount of manpower, material and financial resources

Active Publication Date: 2020-12-29
AEROSPACE INFORMATION RES INST CAS
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the statistical method can only reflect the quantity change of crops in a certain administrative unit, and it is difficult to reflect the spatial difference of crops in the statistical unit; moreover, the acquisition of statistical data consumes a lot of manpower, material and financial resources, and is also interfered by human factors
Simple remote sensing technology is affected by factors such as atmospheric interference, scale conversion and mixed pixels, and it is difficult to obtain the spatial distribution information of the whole crop series on a large regional scale

Method used

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Embodiment Construction

[0034] The present invention will be further described below according to the embodiments and accompanying drawings, and the mode of the present invention includes but not limited to the following embodiments.

[0035] see figure 1 As shown, in this embodiment, winter wheat is taken as an example to carry out crop distribution mapping

[0036] Step 1: Use Harmonic Analysis of Time Series (HANTS) to denoise the data to obtain a smooth time series curve. For different multiple cropping potential areas, use different numbers of frequencies (Number off frequencies) for curve fitting, 3 is used for the second cropping area, and 4 is used for the third cropping area.

[0037] Step 2: After denoising the curve, extract multiple cropping information at the pixel scale. The specific process is as follows:

[0038] Let the pixel value of each time phase of pixel i be a 1 , a 2 …a 23 ,

[0039] ① Compare the size relationship of EVI between two adjacent pixels, and use Δa i Sequen...

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Abstract

The invention discloses a crop distribution map, which is used for calculating the area of each type of crops on each grid according to grid-scale crop planting mode information extracted from remotesensing data and the area proportion of each type of crops on the planting mode of a corresponding administrative unit so as to make a crop spatial distribution map. According to the invention, the crop phenological characteristics of remote sensing recognition are combined with the actual phenological characteristics of the crops to determine the spatial distribution condition of the crops, and large-range, multi-scale and high-spatial heterogeneity crop spatial distribution drawing can be realized through remote sensing macroscopic, rapid acquisition, multi-scale and other characteristics.

Description

technical field [0001] The invention relates to the field of data analysis, in particular to a crop distribution mapping. Background technique [0002] The spatio-temporal distribution of crops reflects the situation of humans using land for agricultural production in different periods. It is an important basic data for research on the pattern and function of farmland ecosystems, the cycle of terrestrial ecosystems, and global changes. Understanding the temporal and spatial distribution of crops is of great significance to ensure national food security and sustainable development of resources and the environment. [0003] At present, the ways to obtain information on the temporal and spatial distribution of crops mainly include administrative statistics and remote sensing monitoring. Among them, the statistical method can only reflect the quantity change of crops in a certain administrative unit, and it is difficult to reflect the spatial difference of crops in the statisti...

Claims

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Application Information

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IPC IPC(8): G06F16/26G06F16/29G06T7/62G06T11/20
CPCG06F16/29G06F16/26G06T11/203G06T7/62
Inventor 左丽君
Owner AEROSPACE INFORMATION RES INST CAS
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