Using 3-bands method, NDVI method for dimidiate pixel model and integration method by QuickBird image to estimate the vegetation fraction of study area, and the estimating values of the three methods were compared and validated.

Taking the southern fringe of Gurbantunggut Desert as research area,the vegetation coverage of CEBERS data were determined by three models:dimidiate pixel model,improved dimidiate pixel model,regression model,taking the estimating results of QuickBird data dimidiate pixel model as true value.

The results show that the dimidiate pixel model based on NDVI can be used in the extraction of vegetation covera.

Based on the dimidiate pixel model and the normalized difference vegetation index,the vegetation fraction of study region can be calculated by using the model of quantifying vegetation fraction from normalized difference vegetation.

Then based on the method of dimidiate pixel model, the c.

Heavy metal and clay pollution information of waste ores has been extracted by mineral index and water pollution information by difference method and vegetation stress by density slice of NDVI based on ASTER data and reflectance curves of objects measured in the field.

And making NDVI value grading and color density to different multitemporal landsat NDVI image can reflect the area s surface vegetation quantitatively and direct chan.