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林业科学 ›› 2005, Vol. 41 ›› Issue (3): 82-87.doi: 10.11707/j.1001-7488.20050314

• 论文及研究报告 • 上一篇    下一篇

沙化土地信息提取研究

王晓慧 李增元 高志海 白黎娜 车学俭 王琫瑜   

  1. 中国林业科学研究院资源信息研究所,北京100091
  • 收稿日期:2005-01-31 修回日期:1900-01-01 出版日期:2005-05-25 发布日期:2005-05-25

Information Extraction of Sandy Land

Wang Xiaohui,Li Zengyuan,Gao Zhihai,Bai Lina,Che Xuejian,Wang Fengyu   

  1. Institute of Forest Resource Information Techniques, CAF Beijing100091
  • Received:2005-01-31 Revised:1900-01-01 Online:2005-05-25 Published:2005-05-25

摘要:

采用LandsatETM +多时相影像,在地类光谱特征分析的基础上,用分层分离的方法,提取出沙化土地信息。以全国沙漠化普查地类划分标准中的植被覆盖度为确定沙化土地程度的依据,通过建立NDVI和实测植被覆盖度的回归模型,确定不同程度沙化土地对应的植被覆盖度与NDVI的对应关系,用NDVI阈值进行划分,得到沙化土地程度图。

关键词: 多时相影像, 分层分离, 沙化土地程度, 植被覆盖度, NDVI

Abstract:

Multi-layer remote sensing information extraction of sandy land using multi-temporal Landsat ETM+ images was developed based on spectral characteristic analysis. Vegetation coverage was used to determine the degree of sandy land according to the land classification standard of the national desertification survey. By regression model of NDVI and vegetation coverage, the relationship was established. The degree of sandy land was divided by the threshold of NDVI, and the degree map of sandy land was derived.

Key words: multi-temporal images, multi-layer extraction, sandy land degree, vegetation coverage, NDVI