This data set is aimed at the Animaqing mountain area in the eastern part of Kunlun Mountains. The data content covers the glacier surface elevation changes in the area from 1985 to 2000, 2000 to 2008 and 2008-2013, including three data files, and the data format is GeoTIFF format. The data set contains three GeoTIFF files, i.e., 1985-2000 glacier surface elevation change, 2000-2008 glacier surface elevation change, and 2008-2013 glacier surface elevation change. Each GeoTIFF file is a single band file, which contains the change of glacier surface elevation in Animaqing mountain area in corresponding period. The spatial reference of the three data files is utm-47 / WGS-84 coordinate system, and the spatial resolution is: elevationchange1985-2000.tif, spatial resolution: 25m; elevationchange2000-2008.tif, spatial resolution: 5m; elevationchange2008-2013.tif, spatial resolution: 10M.
|collect time||1985/01/01 - 2013/12/31|
|collect place||Animaqing Mountain|
|data size||24.5 MB|
Data sources for 1985-2000: 1:50000 aerial topographic map digitization results in 1985 (resolution of 25m) and SRTM data (resolution of 30m) of Animaqing mountain area in 1985. Data sources of 2000-2008: SRTM data of 2000 (resolution of 30m), and DEM extraction of IRS / P5 stereo pair in 2008 (resolution of 5m). 2008-2013 data sources: 2008 IRS / P5 stereo image pair extraction DEM (resolution 5m), and 2012 TanDEM-X / TerraSAR-X radar interferometry generated DEM (resolution 10m).
Before the calculation of glacier surface elevation change, the multi-functional DEM corrector is used to repeatedly register and correct the DEM of the two periods involved in the calculation, so as to ensure that the two have the unified elevation datum and the lowest coordinate deviation, and then obtain the optimal glacier surface elevation change results. The resolution of the data set is selected according to the highest resolution of the DEM in the two periods involved in the difference. The difference between the lower resolution DEM and the higher resolution DEM is determined by bilinear interpolation method, and then the interpolation calculation is carried out to ensure that the difference results can reflect the changes of glacier surface elevation in two periods more precisely and accurately.
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
1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
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