This data set is aimed at Lenglongling area. Using DEM from topographic map and DEM extracted from remote sensing image, the elevation changes of glacier surface at the center of glaciation is obtained through the difference calculation. It only aims at the glacier surface elevation change in Lenglongling area from 1972 to 2016, so it will not be supplemented and improved, and fully open sharing is adopted. The dataset contains one band, elevationchange 1972-2016. 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, which is from 1972 to 2016.
|collect time||1972/01/01 - 2016/12/31|
|data size||219.1 kB|
|Data spatial resolution (/ M)||30.0m|
This data set is mainly interpreted data, and the main data sources are DEM from topographic map and DEM extracted from remote sensing image.
Using DEM from topographic map and DEM extracted from remote sensing image, the elevation changes of glacier surface in the center of glaciation is obtained by calculating the difference.
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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