Percentage vegetation cover of a degrading rangeland from SPOT

Human Activity Influences on Vegetation Cover Changes in Beijing, China, from 2000 to 2015

“…Vegetation coverage has changed dynamically over time, which is of vital importance to global climate change and the creation of environmental policies [4][5][6][7][8][9][10][11][12]. Fractional vegetation coverage (FVC) is a sensitive and important ecological parameter for describing vegetation biomes and ecosystems, and for responding to regional or global environmental change, which is defined as the ratio of the vertical vegetation projected area and surface area within the observation region [13][14][15]. Numerous researchers have used FVC to reveal laws of spatial variation of the surface, to discuss driving factors of change, and to analyze regional ecological transitions [11,[16][17][18].…”

A spectral reflectance-based approach to quantification of grassland cover from Landsat TM imagery

“…Prior to the quantification, the satellite image is usually transformed into various indices, one of the most popular being the normalized difference vegetation index (NDVI) (Dymond, Stephens, Newsome, & Wilde, 1992;Paruelo & Golluscio, 1994), a very useful parameter for distinguishing vegetation when it is green. This relationship may be established through regression analysis of the index against in situ sampled grass cover within a plot.…”

Study on the Change of Vegetation Coverage of Chuxiong City from 2002 to 2016 Based on Landsat Image

“…Dymond 等人于 1992 年用栅格点采样的方法实测了草地的植被覆盖(1992a) [6]。Purevdorj 首先用数码相 机拍摄出的彩色照片，然后计算照片中所有的绿色像元数，从而得到研究区域的植被覆盖度(1998a) [7]。 Cutman 等人在 1998 年发表的论文中，选用像元分解法(高密度模型)，估算全球大范围内的植被覆盖度 (1998a) [8] …”