I have several raster tiles . I have merged them. I don't know why I get a black boarder around the merged map (the pixel values are 0) I have created a polygon for the area of interest to remove the black area but the raster clipper seems doesn't work and again after the clip, I have the black border around my raster. First I don't know why Qgis creates the black border and
Second I don't know why the Raster clipper doesn't work!
I now that I can remove the black border (Just for visualization purposes) through property --> transparency tab. I am looking for a permanent solution)