1. Academy of Remote Sensing Technology and Application, Nanyang Normal University, Wolong Road No. 1638, Nanyang 473061, China
2. Key Laboratory of Natural Disaster and Remote Sensing of Henan Province, Nanyang Normal University, Wolong Road No. 1638, Nanyang 473061, China
3. Engineering Research Center of Environmental Laser Remote Sensing Technology and Application of Henan Province, Nanyang Normal University, Wolong Road No. 1638, Nanyang 473061, China
4. Teacher Education College, Beijing Language and Culture University, Xueyuan Road No. 15, Beijing 100083, China
5. School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China