I shall check the atmospheric correction. Season is same Mr. Lugari. thanks for the answers.
yeah you are correct Mr.Dibs but the vegetation range must be between plus 0.3 to 0.9 or 0.8. and my range ends at plus 0.14.
I agree with you Mr Shukla, vegetation area take high NDVI values and regarding your result I guess the opposit that told Mr Dibs: the site is less covered vegetation area.
Hi Shukla, have you try to interpret image (to reveal different features in the landscape) using different band combinations...
its a mountainous area mr. Benhanifia full of vegetation. and yes i did supervised classification and ground truthing and visual image interpretation (band 4,3,2) mr. shah. thanks for the suggestions.
regards
Miss Acharjee
In this case, NIR and Red bands over the vegetation area have similar values (more correlated) which induce to low NDVI result (close to zero). I think this may be due to the presence of mist over the area as Miss Katarzina said.
Please check whether you have chosen the correct bands for calculation of NDVI. It should be NDVI= (Band4 - Band 3)/(Band4 + Band3).
Dear Shukla,
Most of possibilities that you have to do were mentioned above. But, Just to add some points, I think you better see what methods used and what differences are there between the two Landsat images because the spectral values of NIR and Red bands differ in different land covers and basins.
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