This data set is aimed at the namunani peak area, and the DEM of the area in 2006 obtained from 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 2006, so it is not necessary to supplement and improve, and fully open sharing is adopted. The data set contains dem2006, a total of 1 band. Data set file name and band name are as follows: data set file name: 2006 namunani mountain area digital elevation model data set, dem2006-2006 area digital elevation model (unit: meter (m)). The data set is mainly the data extracted from remote sensing images, which only represents the acquisition time of remote sensing images. The date is August 2006.
|collect time||2006/08/01 - 2006/08/31|
|collect place||Gurla Mandhata|
|data size||1.6 MB|
|Data spatial resolution (/ M)||30.0m|
This data set is mainly interpreted data, and the main data source is alos visible stereo image pair.
Based on the difference of time difference and camera angle, the visible light stereo image pair is interpreted in ERDAS software by 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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