Digital elevation model of the Heihe river basin (2013-2016)- A Big Earth Data Platform for Three Poles

Adopt aster with 30 meter resolution provided by Heihe project data management center GDEM data and 90 meter resolution SRTM data are two sets of grid data, as well as multi-source point data. These point data include radar point cloud elevation data in the middle and upper reaches; elevation data extracted from soil sample points and vegetation sample in the data management center of Heihe plan; elevation data extracted from climate and hydrological stations; and elevation sample data measured by the research group. By using the HASM scaling up algorithm, the grid data of different sources and different precision are fused with the elevation point data to obtain the high-precision DEM data of Heihe River Basin. First of all, the accuracy of two groups of grid data is verified by using various point data. According to the results of accuracy verification, different grid data are used as the trend surface of data fusion in different regions. The residuals of various point data and trend surface are calculated, and the residual surface is obtained by interpolation with HASM algorithm, and the trend surface and residual surface are superposed to obtain the final DEM surface. The spatial resolution is 500 meters.

File naming and required software

The data is stored in grid TIF format and can be opened and read by remote sensing software such as ArcGIS and QGIS

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Yue, T., Zhao, N. (2016). Digital elevation model of the Heihe river basin (2013-2016). A Big Earth Data Platform for Three Poles, (Download the reference： RIS | Bibtex )

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