Digital elevation model of China (1KM)


DEM is the English abbreviation of Digital Elevation Model, which is the important original data of watershed topography and feature recognition.DEM is based on the principle that the watershed is divided into cells of m rows and n columns, the average elevation of each quadrilateral is calculated, and then the elevation is stored in a two-dimensional matrix.Since DEM data can reflect local topographic features with a certain resolution, a large amount of surface morphology information can be extracted through DEM, which includes slope, slope direction and relationship between cells of watershed grid cells, etc..At the same time, the surface flow path, river network and watershed boundary can be determined according to certain algorithm.Therefore, to extract watershed features from DEM, a good watershed structure pattern is the premise and key of the design algorithm.

Elevation data map 1km data formed according to 1:250,000 contour lines and elevation points in China, including DEM, hillshade, Slope and Aspect maps.

Data set projection:

Two projection methods:

Equal Area projection Albers Conical Equal Area (105, 25, 47)

Geodetic coordinates WGS84 coordinate system


Data file naming and use method

Data is divided into Albers and Geo folders, named: chdem_105, chdem_Slope, chdem_Aspect, chdem_hillshade
It can be opened by arcgis, Qgis and other remote sensing software.


Required Data Citation View Data Cite Help About Data Citation
Cite the data

TANG Guoan. Digital elevation model of China (1KM). National Tibetan Plateau Data Center, 2019. (Download the reference: RIS | Bibtex )

Using this data, you must reference article references listed in the Required Data Citation and reference data


Support Program

Pan-Third Pole Environment Study for a Green Silk Road-A CAS Strategic Priority A Program

User Limit

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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
Spatial coverage

East: 135.50

South: 17.80

West: 73.20

North: 53.90

Detail
  • Spatial resolution: km
  • File size: 977 MB
  • Browse count: 325 Times
  • Apply count: 33 Times
  • Share mode: online
  • Temporal coverage: 2000
  • Updated time: 2019-08-09
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Contact Information
: TANG Guoan  

Distributor: National Tibetan Plateau Data Center

Email: data@itpcas.ac.cn

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