Vegetation coverage data set of Ganqingning national key management area in 2021

English name

CSTR

CSTR:11738.11.ncdc.hhstbc.db2576.2022

DOI

10.12072/ncdc.hhstbc.db2576.2024

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Category

Soil and Water Conservation

contributors

Monitoring Center for ecological environment of soil and water conservation in the Yellow River Basin

Datasets description

 <p>The vegetation coverage data set of Ganqingning national key management areas in 2021 includes Chengdong District, Chengzhong District, Chengxi District, Chengbei District, Datong Hui and Tu Autonomous County, Huangzhong County, Huangyuan County, Ledu County, Ping'an County, Minhe Hui and Tu Autonomous County, Huzhu Tu Autonomous County, Hualong Hui Autonomous County, Xunhua sala Autonomous County, Jianzha county and guide county, Tongxin County, Yuanzhou District, Xiji County, Pengyang County, Haiyuan County, Ningxia Hui Autonomous Region Huining County, Anding District, Yongjing County, Zhuanglang County, Honggu District, Qilihe district, Dongxiang Autonomous County, Wushan County, Yuzhong County, Weiyuan County, Kangle County, Zhangxian County, Jingyuan County, Xigu District, Jishishan Bao'an County, Dongxiang Sala Autonomous County, Longxi County, Guanghe County, Lintao County The statistical table of vegetation coverage of 48 counties in Linxia city, Linxia County, Gangu County, Tongwei County, Anning District, Qin'an County, Hezheng County, Maiji District, Qinzhou District and Chengguan District in 2021 is obtained by processing satellite remote sensing image with spatial resolution of 2m, and the saved format is xlsx. The data name is in the form of "key management area + year + forest and grass vegetation coverage statistical table", Such as“ ×× Key governance areas ×× Statistical table of annual forest and grass vegetation coverage. The vegetation coverage is divided into five levels: high coverage, medium high coverage, medium coverage, medium low coverage and low coverage.</p>

Base information

collect time	2021/01/01 - 2021/12/31
collect place	National key control area of Yellow River with abundant and coarse sediment
data size	6.4 MiB

Data source description

                                                                                                <p>The data sources are ZY-3 and Gao FEN-1 satellite images, which are mainly obtained from the information center of the Ministry of water resources.</p>

Data processing method

                                                                                                <p>Based on the method of remote sensing estimation, the normalized vegetation index (NDVI) is used to estimate the vegetation coverage by using the pixel dichotomy model. The method is to first calculate the NDVI of each pixel using the near infrared band and red band data of multispectral images, and then use the model to calculate the vegetation coverage of the whole region. Then the land use type data from remote sensing interpretation and the vegetation coverage data from remote sensing estimation are superimposed to obtain the vegetation coverage information of each pixel. Finally, according to the classification rules, the vegetation coverage was classified, and the statistical table of forest and grass vegetation coverage was obtained.</p>

Data quality description

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Remote sensing images are preprocessed by radiation correction, orthorectification, fusion and mosaic. 2. The actual surface area corresponding to the minimum spot area is not less than 0.1 h ^, the polygons have no overlap, no gap, and the spot attributes have no vacancy or redundancy. 3. Before the remote sensing image interpretation, the remote sensing image, typical investigation and field comparison methods are used to establish the remote sensing interpretation marks of forest and grass sample plots. 4. Based on remote sensing images, combined with interpretation marks, extract land use types. 5. Review of interpretation results: no less than 5% of the total map spots shall be selected for verification. 6. The number and results of field verification samples meet the requirements of technical specification for remote sensing monitoring of soil and water conservation (sl592-2012). For verification spots, 10% are selected as verification samples for field verification.

Citations and annotations

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For the achievements published in English, please refer to the following specifications： The dataset is provided by National Cryosphere Desert Data Center. (http://www.ncdc.ac.cn).

Data reference

Monitoring Center for ecological environment of soil and water conservation in the Yellow River Basin. Vegetation coverage data set of Ganqingning national key management area in 2021. National Cryosphere Desert Data Center(http://www.ncdc.ac.cn), 2022. https://cstr.cn/CSTR:11738.11.ncdc.hhstbc.db2576.2022.
Monitoring Center for ecological environment of soil and water conservation in the Yellow River Basin. Vegetation coverage data set of Ganqingning national key management area in 2021. National Cryosphere Desert Data Center(http://www.ncdc.ac.cn), 2022. https://www.doi.org/10.12072/ncdc.hhstbc.db2576.2024.

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license agreement

This work is licensed under CC BY 4.0 (Creative Commons Attribution 4.0 International License).

Relevant data
File list

#	Dataset title
1	Vegetation coverage data set of Ganqingning national key management area in 2022
2	Vegetation coverage data set of Ganqingning national key management area in 2023
3	Vegetation coverage data set of Ganqingning national key management area in 2020
4	Vegetation coverage data set of Ganqingning national key management area in 2024
5	Vegetation coverage data set of Ganqingning national key management area in 2019
6	Vegetation coverage data set of Zhongtiaoshan national key management area in Funiu Mountain in 2021
7	Vegetation coverage data set of Zhongtiaoshan national key management area in Funiu Mountain in 2020
8	Vegetation coverage data set of Zhongtiaoshan national key management area in Funiu Mountain in 2022
9	Vegetation cover data set of the Yellow River Sandy and coarse sand national key control area in 2021
10	Soil erosion data set of Ganqingning national key control area in 2021

#	title	file size
1	2021年黄河流域（片）甘青宁黄土丘陵国家级重点治理区植被覆盖图.jpg	6.4 MiB

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How to get the data

Theme:
Statistical table of vegetation coverage different coverage area and proportion of high
Time:
2021
Place:
Gansu

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Contact information

contributors:: Monitoring Center for ecological environment of soil and water conservation in the Yellow River Basin
author:: Li Suya
manager:: Li Suya

Platform Service information

contacts:: Li Hongxing
phone:: 0931-4967592
mailbox:: ncdc@lzb.ac.cn