In this data set, we use DEM, SRTM (2000) and DEM extracted from remote sensing image to get the elevation change of glacier surface of glaciation center through difference calculation. It only aims at the glacier surface elevation change in the eastern peak area of gradan from 1968 to 2013, so it will not be supplemented and improved, and fully open sharing is adopted. The dataset contains two bands, elevation change 1968-2000 and elevationchange 2000-2013. Field measurement unit: meter (m). The data set is mainly extracted from remote sensing images and only represents the change of glacier surface elevation at the time of remote sensing image acquisition. The time is 1968-2000 and 2000-2013.
|collect time||1968/01/01 - 2013/12/31|
|collect place||Eastern Grantham|
|data size||3.1 MB|
This data set is mainly interpreted data. The main data sources are DEM of topographic map, SRTM (2000) and DEM extracted from remote sensing image.
Based on DEM of topographic map, SRTM (2000) and DEM extracted from remote sensing image, the elevation change of glacier surface at the center of glaciation was obtained by difference calculation.
After checking the accuracy of DEM in different periods, the plane and elevation are corrected by using the cosine relationship between slope aspect and elevation difference. Then, the relationship between the maximum curvature and elevation difference is used to reduce the error caused by different resolutions. The DEM registration and relative accuracy evaluation of the two periods are carried out, and the glacier elevation changes in different periods are obtained
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