Detection and Classification of Grassland with Stellera chamaejasme through HJ-1A Hyperspectral Image in Northern Tibet
Fenfen Guo, Jingjing Xiao, Jianrong Fan
Available Online April 2017.
- https://doi.org/10.2991/iceesd-17.2017.86How to use a DOI?
- Northern Tibet, Stellera chamaejasme., Grassland degradation, HJ-1A, Hyperspectral.
- Stellera chamaejasme is the most typical invasive plant in North Tibet. Monitoring the distribution of the Stellera chamaejasme is the prerequisite for grassland quality evaluation or management. In this paper, the hyperspectral image of HJ-1A satellite (HJ-1A HSI) was used to monitor the Stellera chamaejasme in the northern region of Xainza. Linear Spectral Unmixing (LSU) algorithm was used to get the abundances of six landuse types(include grassland with Stellera chamaejasme) based on HSI. Feature extraction method of principle component analysis (PCA) was used to compress the HSI information into five bands. And then, maximum likelihood classifier(MLC) was applied to the six abundances and the first five principal components for getting the classification result. The result showed that the classification result of LSU-MLC was better than PCA5-MLC, the mapping accuracy of Stellera chamaejasme grassland based on both methods were all greater than 91%, the user accuracy was all greater than 66%. We concluded that HJ-1A HSI can be used to detect and classify Stellera chamaejasme in northern Tibet. In addition, we got the spatial distribution characteristics of Stellera chamaejasme by overlay analysis of classification result with the terrain factors: the Stellera chamaejasme mainly distributed in the area with elevation between 4500 and 4800m, slope less than 10§ and mostly in the Southwest aspect, where radiation and hydrothermal condition were favorable.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Fenfen Guo AU - Jingjing Xiao AU - Jianrong Fan PY - 2017/04 DA - 2017/04 TI - Detection and Classification of Grassland with Stellera chamaejasme through HJ-1A Hyperspectral Image in Northern Tibet BT - 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017) PB - Atlantis Press SP - 453 EP - 459 SN - 2352-5401 UR - https://doi.org/10.2991/iceesd-17.2017.86 DO - https://doi.org/10.2991/iceesd-17.2017.86 ID - Guo2017/04 ER -