This data includes lake and river elements of five Central Asian countries. Using Albers' equal area conic projection, using ENVI and ecognition software, the authors selected the green band and near-infrared band which strongly reflected the water body to carry on the superposition calculation, superposed the TM data under the generated vector layer, and extracted the lake and River elements through manual intervention correction To generate the distribution data of lakes and rivers in Xinjiang and Central Asia. See this data document for data attribute information. The data can be used as scientific data to investigate the distribution of lakes and rivers in Central Asia. This data is vector data, and the data attribute information includes the following fields: polygon feature idarea: area perimeter: objectid: Lake River number.
|collect time||2000/01/01 - 2010/01/01|
|collect place||Five Central Asian countries|
|data size||24.0 MB|
|Data time resolution||year|
1:250000 lake and river distribution data in Central Asia, which was independently completed by Xinjiang Institute of ecology and geography, Chinese Academy of Sciences. The main data sources are as follows: 1. TM remote sensing data of 2000. The above data are from the accumulation of scientific research achievements of the Institute for many years.
By using ENVI and eCognition software, the green band and near-infrared band which reflect strong water body are selected for superposition calculation. TM data is superimposed under the generated vector layer, and the final data product is produced by manual intervention correction.
Data collection is performed according to vectorization standards, and corrections are made strictly according to TM data.
©Copyright 2005-2020. Northwest Institute of Eco-Environment and Resources, CAS.
Donggang West Road 320, Lanzhou, Gansu, China (730000)