This data set aims at Gongga mountain area, and obtains the digital elevation model of the area in 2015 by using remote sensing images. The data set contains one band, which is mainly generated by stereo image pair of ZY-3 remote sensing image. Only for the glacier surface elevation in 2015, so it will not be supplemented and improved, and fully open sharing is adopted. The data set contains dem2015, a total of 1 band. Data set file name and band name are as follows: data set file name: 2015 Gongga Mountain digital elevation model data set, dem2015-2015 digital elevation model of the region (unit: meter (m)).
|collect time||2015/02/01 - 2016/08/01|
|collect place||Gongga Mountain|
|data size||12.8 MB|
|Data spatial resolution (/ M)||30.0m|
This data set is mainly interpreted data, and the main source of data is the remote sensing data of resource 3.
Digital elevation model of the glacier area obtained by the DEM extraction module under ENVI5.1 from Resource 3 stereo relative ortho- and hind-view images.
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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