<p>The 2020 spatial distribution product of planting intensity of 30m cultivated land in Xinjiang and the five Central Asian countries (GCI30_2020) was selected from global products according to the borders of Xinjiang and the five Central Asian countries. No other processing was carried out, and the original data was retained. Geospatial information, data accuracy and data organization form. The data format Geotiff, with a spatial resolution of 30m, is organized as a 10°×10° grid. There are 6 grids covering Xinjiang and 14 grids covering five Central Asian countries. </p>
The development of the Global Spatial Distribution Product for Planting Intensity of 30m Cultivated Land in 2020 (GCI30_2020) mainly uses medium and high resolution remote sensing data from 2019 to 2021. Due to the differences in crop growth periods at different latitudes in the northern and southern hemispheres, the remote sensing data required for studying the spatial distribution of cultivated land planting intensity in different regions of the world have different time periods. Most areas in the northern hemisphere use data from February 2, 2019 to February 1, 2022; Most areas in the southern hemisphere use data from November 1, 2018 to October 31, 2021; Due to the special phenological period in some areas, data from late August 2018 to mid-August 2021 are used. The geographical range of the product includes 180° east longitude to 180° west longitude and 60° south latitude to 80° north latitude. High latitude areas in the northern and southern hemispheres and oceans are not within the monitoring range.
Global products are stored in a segmented manner, and segmented files are organized in a 10°×10° grid, with a total of 293 grids. Each image block is encoded according to the latitude and longitude in the upper left corner, with latitude at the front and longitude at the back. The latitude is 2 digits plus the south and north latitude (S/N) identification prefix, and the longitude is 3 digits plus the east-west longitude (E/W) identification prefix. Among them, N is used at 0 degrees latitude and E is used at 0 degrees longitude. In the data product, each block file contains 2 layers, of which layer 1 is the number of times crops were planted by each cultivated cell from 2019 to 2021. The numerical type is integer, and the effective value is less than 100. The value of 100 represents the background cell; Layer 2 is the number of times crops were planted by cultivated land cells in 2020. The numerical type is integer. The value 1 represents a single-season planting pattern, the value 2 represents a dual-season planting pattern, the value 3 represents a dual-season planting pattern and the value 100 represents a background cell.
No geographical information processing was performed.
In terms of product accuracy evaluation, during the data production process, the entire process is generated using standard algorithms without manual intervention, and the data is objective and fair; after the data is exported, a special person is responsible for data quality inspection, and all shared 293 data blocks meet quality requirements. Accuracy verification in 8 10° ×10° regions around the world showed that the average accuracy of the 30-m resolution cultivated land multiple cropping index algorithm was 90.4%. Further stratified sampling was carried out in different agricultural ecological regions around the world, and 3662 multiple cropping index verification samples were identified. For accuracy verification of global data products, the overall accuracy was 92.9%.
This work is licensed under a
Creative
Commons Attribution 4.0 International License.
10.12237/casearth.62ff4caa819aec75a535cbe7
