This data set is aimed at Lenglongling area, and the digital elevation model of this area in 2016 obtained from remote sensing images. The data set contains one band, which is mainly generated by stereo image pair of ZY-3 remote sensing image. It is only for the glacier surface elevation in 2016, so it is not supplemented and improved. The data set mainly refers to the data extracted from remote sensing images, which only represents the acquisition time of remote sensing images. The date is August 2016, and it is fully open and shared. The data set contains dem2016, a total of 1 band. The corresponding file name and band name of the dataset are as follows: dataset file name: 2016 Lenglongling digital elevation model dataset, dem2016-2016 digital elevation model of the region (unit: meter (m)).
|collect time||2016/08/01 - 2016/08/31|
|data size||2.5 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.
©Copyright 2005-2020. Northwest Institute of Eco-Environment and Resources, CAS.
Donggang West Road 320, Lanzhou, Gansu, China (730000)