In 2018, the land use statistical table data set of Zhongtiaoshan national key control area of soil and water loss in Funiu Mountain includes Gongyi City, Luolong District, Yanshi City, Mengjin County, Xin'an County, Song County, Yiyang County, Luoning County, Yichuan County, Hubin District, shaanzhou District, Yima City, Lingbao City, Mianchi County, Jiyuan City, Shanxi Province, Yangcheng County, Yanhu District, Yuanqu County, Xiaxian county and Pinglu County of Henan Province The land use statistical table of the county in 2018 is obtained based on the processing of satellite remote sensing image with spatial resolution better than 16m. The data is named in the form of "key governance area + administrative region + year + land use statistical table", such as "land use statistical table of ×× key governance area ×× County ×× year". The classification system of land use includes 8 first class classes and 25 second class classes.
The land use remote sensing image data sources are ZY-3 and gaofen-1 satellite images, which are obtained from the information center of the Ministry of water resources.
Based on ecognition software platform, the method of combining object-oriented computer automatic classification with manual visual interpretation was used to extract the annual land use data of the study area. Finally, three methods are used to verify the data accuracy: field sample point survey, high resolution image recognition and Google Earth sample point recognition.
The remote sensing images are preprocessed by radiation correction, orthorectification, fusion and mosaic. The actual surface area corresponding to the minimum patch area is not less than 0.1 Hm2, the polygon has no overlap, no gap, and the patch attribute has no vacancy or redundancy. Before remote sensing image interpretation, remote sensing image, typical survey and field comparison were used to establish remote sensing interpretation marks of land use. Based on the remote sensing image, combined with the interpretation marks, the land use types are extracted. Reexamination of interpretation results: take no less than 5% of the total map spots for verification. 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 the verification map spots, 10% of the verification samples are selected for field verification.
This work is licensed under
CC BY 4.0 (Creative Commons Attribution 4.0 International License).
CSTR:11738.11.ncdc.HHSTBC.2020.235
10.12072/ncdc.HHSTBC.db0074.2021
