Water index in the Qilian Mountain Area (1980-2015)

Water index in the Qilian Mountain Area (1980-2015)


This dataset contains the ground surface water (including liquid water, glacier and perennial snow) area in Qilian Mountain Area from 1980 to 2015. The dataset was produced based on classical Normalized Difference Water Index (NDWI) extraction criterion and manual editing. Landsat images collected between 1978 and 2018 were used as basic data for water index extraction. Sentinel-2 images and Google images were employed as reference data for adjusting the extraction threshold. The dataset was stored in SHP format and attached with the attributions of coordinates and water area. Consisting of 8 seasons, the dataset has a temporal resolution of 5 years and a spatial resolution of 30 meters. The accuracy is about 1 pixel (±30 meter). The dataset directly reflects the variation of water distribution within the Qilian Mountain in the past 35 years, and can be used for quantitative estimation of water resource.


File naming and required software

File Naming Convention: Class_coordinate_YYYY.shp (YYYY: year)
Data Version:V1.0
Projection:+proj=longlat +datum=WGS84 +no_defs
Data Format: shp
Water body:Polygon vector
Usage:The datasets are stored in the form of Class_coordinate_YYYY.shp, and can be read by Arcgis or Envi.


Data Citations Data citation guideline What's data citation?
Cite as:

Li, J., Li, J. (2019). Water index in the Qilian Mountain Area (1980-2015). National Tibetan Plateau Data Center, DOI: 10.11888/Geogra.tpdc.270233. CSTR: 18406.11.Geogra.tpdc.270233. (Download the reference: RIS | Bibtex )

Using this data, the data citation is required to be referenced and the related literatures are suggested to be cited.


References literature

1.Du, Z.Q., Li, W.B., Zhou, D.B., Tian, L.Q., Ling, F., Wang, H.L., Gui, Y.M., &Sun, B.Y. (2014). Analysis of Landsat-8 OLI imagery for land surface water mapping. Remote Sensing Letters, 5(7), 672-681. (View Details )


Support Program

Pan-Third Pole Environment Study for a Green Silk Road-A CAS Strategic Priority A Program (No:XDA20000000)

the Strategic Priority Research Program of the Chinese Academy of Sciences (No:XDA20100101) [XDA20100101]

Copyright & License

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Example of acknowledgement statement is included below: The data set is provided by National Tibetan Plateau Data Center (http://data.tpdc.ac.cn).


License: This work is licensed under an Attribution 4.0 International (CC BY 4.0)


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Keywords
Geographic coverage
East: 107.00 West: 89.00
South: 34.00 North: 45.00
Details
  • Temporal resolution: 1 year < x < 10 year
  • Spatial resolution: m
  • File size: 343 MB
  • Views: 1,662
  • Downloads: 67
  • Access: Open Access
  • Updated time: 2021-04-19
Contacts
: Li Jia   LI Jianjiang  

Distributor: National Tibetan Plateau Data Center

Email: data@itpcas.ac.cn

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