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A method of updating global crop total yield raster data

A raster data, total output technology, applied in the field of resources and environment, can solve problems such as low data resolution and lack of timeliness of data

Active Publication Date: 2019-07-02
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the data has not been updated for more than 10 years, the data lacks timeliness, and the data resolution is low, which is 5*5 points. Therefore, it is particularly important to improve the data accuracy and update the total crop output raster data

Method used

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Examples

Experimental program
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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with specific embodiments.

[0030] A1 Data preparation: select the updated land use raster data, such as GlobeCover 2009 land use cover data;

[0031] A2 Use the tool Calculate Statistics of ArcGIS for statistical analysis, which is convenient for classification, and output the file landuse_stat.tif;

[0032]A3 high-pass filter processing. In order to reduce data fragmentation, use the Majority Filter tool for high-pass filtering processing, select the parameters as the surrounding 8 adjacent pixels, replace the threshold method as majortiy (moderate number), and output the raster layer landuse_major.itf;

[0033] A4 data export. Export the landuse_major.tif data of A3, and output the TIFF format file, the file name is landuse_export.tif, the default output grid size is 0.008333333, and the grid size is 1 / 10 of the grid size of the original output grid (0.08333333);

[0034] A5 Reclassify land us...

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Abstract

The invention discloses a method for updating global crop total yield grid data. The method comprises the steps of data preparation, statistical analysis, high-pass filtering processing, data exporting, land utilization reclassification, aggregation analysis and the like. By means of the method, the global total yield grid data of 175 different crops can be updated in time, the data timeliness ishigh, and the data precision is high.

Description

technical field [0001] The invention belongs to the technical field of resources and environment, and in particular relates to a method for updating grid data of total crop output based on spatial analysis technology. Background technique [0002] Farmland covers approximately 15 million square kilometers on Earth, provides most of our food and is critical to human well-being. Although most satellite constellations of global land cover cover cropland datasets with only a few categories, they provide crucial information for answering key questions ranging from biodiversity conservation to food security to biogeochemical cycles. Information on agricultural land use measures such as crop selection, yields and fertilizer use is more limited. Monfreda et al proposed that by combining national and state land use data sets and county-level census statistics, the updated global farmland data set is a 5*5 point (about 10 km by 10 km) latitude and longitude grid, generating a global ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18G06K9/62
CPCG06F17/18G06F18/24
Inventor 周卫何萍徐新朋雷秋良梁霞梁国庆艾超
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI