Method and device for detecting carbon sequestration amount of plot crops based on MODIS (Moderate Resolution Imaging Spectroradiometer) image

A detection method and technology for carbon fixation, which are applied in measurement devices, image enhancement, image analysis, etc., can solve problems such as incorrect parameter selection, inaccurate detection of carbon fixation, and human error interference, so as to improve detection accuracy and speed. and accuracy, the effect of improving accuracy

Inactive Publication Date: 2022-03-22
杭州领见数字农业科技有限公司
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  • Abstract
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Problems solved by technology

[0004] This application provides a method and device for detecting the amount of carbon sequestration of crops based on MODIS images, aiming to solve the problem of carbon sequestration capacity changes caused by crops themselves, external climate conditions, and human factors in a certain plot above, resulting in carbon sequestration Inaccurate quantitative detection and manual investigation of crop planting, there are problems of human error interference or wrong parameter selection

Method used

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  • Method and device for detecting carbon sequestration amount of plot crops based on MODIS (Moderate Resolution Imaging Spectroradiometer) image
  • Method and device for detecting carbon sequestration amount of plot crops based on MODIS (Moderate Resolution Imaging Spectroradiometer) image
  • Method and device for detecting carbon sequestration amount of plot crops based on MODIS (Moderate Resolution Imaging Spectroradiometer) image

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Experimental program
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Effect test

Embodiment 1

[0051] like figure 1 As shown, a method for detecting carbon sequestration of plot crops based on MODIS images includes the following steps:

[0052] S11. Obtain MODIS image data of the area to be measured;

[0053] S12. Splicing and reprojecting the image data using command indicators, and establishing a coordinate system using WGS84 to obtain a preprocessing layer;

[0054] S13. Process and calculate the pretreatment layer according to the pretreatment method to obtain the net photosynthesis amount;

[0055] S14. Multiply the net photosynthesis amount by the area of ​​the region to be measured according to the fourth-order calculation algorithm to obtain the carbon sequestration amount of crops in the region to be measured.

[0056] In Example 1, first obtain MODIS image data from NASA, and select a fixed area, that is, the area to be tested, determine the time period to be detected, select the data type as MOD17A2H data, and then judge whether the area to be tested is lar...

Embodiment 2

[0058] like figure 2 As shown, a method for processing and calculating the pre-processing layer according to the pre-processing method to obtain the net photosynthesis amount includes the following steps:

[0059] S21. Perform numerical conversion of the PsnNet_500m layer by a raster calculator, calculate according to the formula PsnNet_500m.tif"*0.0001*1000, and obtain the first layer of conversion factor elimination, wherein PsnNet_500m.tif is the PsnNet_500m layer The label image text format, 0.0001 is the scale factor of the MOD17A2H data, and 1000 is a constant;

[0060] S22. Perform category filling on the first layer according to the Setnull function of the raster calculator to obtain a filled second layer.

[0061] In Example 2, because the PsnNet_500m layer is a layer in the MOD17A2H data product, there is a conversion factor in the data product, and the conversion factor is 0.0001, so in order to remove this factor, it is necessary to use a raster calculator in Arc...

Embodiment 3

[0063] like image 3 As shown, a method for calculating the carbon sequestration of crops in the area to be measured includes the following steps:

[0064] S31. Judging whether the area to be tested is greater than a second preset threshold;

[0065] S32, yes, then divide the area to be measured according to the ArcGIS zoning statistical method to obtain the unit area, and calculate according to the first calculation formula E=A*(B1+B2+B3...+Bn) / n of the carbon fixation amount, Obtain the first detection data of the amount of carbon fixation in the area to be measured, wherein E is the amount of carbon fixation, A is the area value of the area to be measured, and B1, B2, B3, Bn are the net photosynthesis amount according to the unit area , n is a natural number that is not zero;

[0066] S33. No, then calculate according to the second calculation formula E=A×B of the amount of carbon fixation to obtain the second detection data of the amount of carbon fixation in the area to...

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Abstract

The invention provides an MODIS image-based plot crop carbon sequestration amount detection method and device, and is applied to the field of greenhouse gas emission reduction, and the method comprises the steps: obtaining MODIS image data of a to-be-detected region; splicing and re-projecting the image data by using a command indicator, and establishing a coordinate system by using WGS84 to obtain a preprocessed layer; processing and calculating the preprocessed image layer according to a preprocessing mode to obtain a net photosynthesis quantity; and multiplying the net photosynthesis quantity by the area of the to-be-measured region according to a four-order operation algorithm to obtain the carbon sequestration quantity of crops in the to-be-measured region. According to the technical scheme, the mode of obtaining the MODIS remote sensing image is adopted to detect the carbon sequestration amount, the whole process is automatically carried out, real-time automatic monitoring can be achieved on the to-be-detected area, manual input is reduced, errors easily caused by manual work are avoided, and the detection efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to the field of greenhouse gas emission reduction, in particular to a method and device for detecting the carbon fixation amount of plot crops based on MODIS images. Background technique [0002] Climate change is a global problem facing mankind. With the emission of carbon dioxide in various countries, greenhouse gases have soared, posing a threat to living systems. Countries around the world have adopted a global agreement to reduce greenhouse gas emissions. Against this background, my country has proposed the goals of carbon peaking and carbon neutrality. In recent years, my country has actively participated in carbon emission reduction in the international community and actively complied with global green and low-carbon development. In order to offset the carbon dioxide emissions produced by itself in the form of afforestation, the concept of carbon sink is proposed. This concept refers to the absorption of carbon dioxide in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N21/01G06V20/10G06V10/22G06T7/62G06T11/40
CPCG01N21/84G01N21/01G06T7/62G06T11/40G06T2207/10032G06T2207/30188G01N2021/0112
Inventor 周祖煜陈煜人凌前江白博文莫志敏王俊霞张澎彬张浩李天齐刘俊
Owner 杭州领见数字农业科技有限公司
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