This data set is aimed at the Youyi peak area of Altay Mountain, including the glacier and surrounding area in the Youyi peak area of Altay Mountain. The DEM of the area in 2008 is obtained by using remote sensing images. The data set contains one band, which is mainly based on the difference of time difference and camera angle, and the digital elevation model of glacier area is obtained in ERDAS software based on the principle of forward intersection. It is only aimed at the glacier surface elevation in 2008, so it is not necessary to supplement and improve it, and fully open sharing is adopted. The data set contains dem2008, a total of 1 band. Data set file name and band name are as follows: data set file name: 2008 Aertai mountain Youyi peak area digital elevation model data set: dem2008-2008 digital elevation model of this area, unit: meter (m).
|collect time||2008/08/01 - 2008/08/31|
|collect place||Altai Mountain friendship peak|
|data size||98.6 MB|
|Data spatial resolution (/ M)||30.0m|
The main data source is aster.
Based on the difference of time difference and photography angle, the digital elevation model of glacier area is obtained in ERDAS software by using aster visible light stereo image pair and the principle of forward intersection.
The DEM extraction module of envi 4.7 software is used to extract DEM data from stereo image pairs. In order to eliminate the stripe effect and improve the stability and reliability of DEM data extraction, the radiometric correction parameters in the data source are used to correct the stereo image pair. In the process of DEM data extraction, according to the distribution of typical research areas, the stereo image pairs are divided into blocks, covering at least 20 GCPs in each typical research area, and evenly distributed in non glacial areas. The elevation control points are extracted from the historical topographic map data of China, and the plane control points are extracted from the Landsat TM + image of the same period.
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