This data set is aimed at the eastern peak area of gradan, including glaciers and surrounding areas. The DEM of the area in 2013 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. Only for the glacier surface elevation in 2013, so it will not be supplemented and improved, and fully open sharing is adopted. The data set contains dem2013, a total of 1 band. The corresponding file name and band name of the dataset are as follows: the file name of the dataset: the DEM dataset of the eastern peak area of gradan in 2013, and the DEM 2013-2013 DEM of the region (unit: m).
|collect time||2013/02/01 - 2013/02/28|
|collect place||Eastern Grantham|
|data size||14.6 kB|
|Data spatial resolution (/ M)||30.0m|
The main data source is spot6.
Based on the difference of time difference and photography angle, the digital elevation model of glacier area is obtained in ERDAS software based on 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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