Abstract:

With the establishment and improvement of domestic Gaofen satellite ground observation system, the need for refined ecological remote sensing monitoring and analysis has been put on the agenda. The authors took Xinjiang Uygur Autonomous Region Bayinguoleng Mongolian Autonomous Prefecture Hejing County as an example, used GIS and remote sensing technology to perform normalized vegetation index (NDVI) inversion on the satellite data of Gaofen No.6, to generate vegetation index coverage levels and combined land use types, analyzed the current situation of vegetation ecological landscape in the study area; and used DEM data to extract the two main topographic factors of elevation and slope to conduct correlation analysis of the spatial distribution of NDVI values. The results show that: (1) the spatial distribution of vegetation coverage in Hejing County has obvious spatial heterogeneity, in general, it is mainly moderate and low coverage vegetation; (2) the vegetation index of Hejing County at low altitude and high altitude area is relatively low, and the vegetation index reaches the maximum in the middle altitude area (2500-3200 m), the maximum value was 0.48; (3) the slope has greater impact on vegetation. At about 10°, the vegetation growth is good and the vegetation index reaches the maximum.

Key words: GIS, Remote Sensing Technology, Gaofen No.6 Satellite, NDVI, Altitude, Slope