serdawe

Hello, Does anyone know how to obtain vegetation percentage map from NDVI image? Thank you in advance.

Hello all, I have downloaded 3 satellite images (Landsat 8 OLI TC1P), in three different periods (two images are from Mart 4. 2017. and the one is from Mart 20. 2017). I have joined (made mosaic) them in ENVI and have got mosaic with overlapping (Figure 1). Next, I have obtained NDVI in Arc Map and got NDVI with inappropriate values in the overlapping part of the image (Figure 2). Do you know how to manage this problem? Thank you in advance!

Ok thank you, and about atm. correction (in FLAASH) ? Should I do it on the separated images or on the mosaic? Thank you very much?

Dear all, sorry if this topic exist here... I have a few question: I have downloaded three Landsat images (L1TP) because my study area is very big, there is overlapping between images. I would like to make NDVI for that area, and I am interested what the steps are: Do I need to do atmospheric correction first, then I have use copy raster tool to eliminate black NoData part of the images?....after that how to merge (join) images but to avoid lines because of overlapping. After that I guess I can make NDVI? Thank you all in advance