I have two Landsat 5 NDVI images (Surface Reflectance products) from the same period of the year (only a few days apart), but one is from the 1980s and one from the 2000s. I am trying to do a change detection procedure based on NDVI differencing, and the expected outcome (based on aerial photographs) is that NDVI should have increased due to a widespread reforestation process, so the result of the differencing process (2007NDVI - 1987NDVI) should highlight mainly a) unchanged areas and b) areas of ndvi increase.
I tried to reclassify the difference image using a threshold calculated as
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I tried to reclassify the difference image using a threshold calculated as
أكثر...