Hi folks,
I wonder if anyone know how to calculate the fractional vegetation cover (FVC) from Landsat imagery? As far as I have read about that NDVI, NDVIs, and NDVIv are three required input for calculation FVC as follow equation:
FVC = ( NDVI − NDVIs )/( NDVIv − NDVIs ) (1)
where:
- NDVI is given by: NDVI = (nir − red)/(nir − red); nir and red are corrected reflectance obtained from the sensor bands located in the near infrared (NIR) and the red spectral regions for each pixel within an image
- The NDVIs and NDVIv are values of the NDVI for bare soil (FVC = 0) and pure green vegetation (FVC = 1) within an image, respectively
However, the major problem when applying Eq.(1) is how to accurately estimate the NDVIs and NDVIv values on the Landsat imagery. Therefore, I need you support on how to retrieve the values for NDVIs and NDVIv and the way we can calculate them from Landsat or other RS images pls?
Thank you very much with kind regards
Bang
Thank you very much Nasir Hameed for your advice and the suggested link on the article. That's so useful review article (from my quick reading on abstract), I appreciated very much for your help. Regards
Hello Bang Nguyen Tran ,
I think you need a classification image that can be done by your downloaded Landsat image. I use LULC classes to classify Landsat imagery. In addition, if you don't want to classify the image by yourself, then you can find a classification product with predefined classes. Most of the classification systems such as (LULC) have barren land, and forest land that you can use for your references.
Once you have the classes, you can separate them individually and provide a separate shapefile. Then you can use that shapefile to clip your vegetative and barren lands. Finally, you can use spatial statistics to get the average NDVI values for your shapefiles. Average NDVI values for these two classes can be used as a representative for your class NDVI.
Hope this helps, nima
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