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Why do bilinear interpolation and cubic convolution resampling have artifacts at raster edges?
Bilinear interpolation and cubic convolution sometimes interpolate incorrectly into the NoData and background areas of your raster. Often, you can see artifacts or black ridges where this is occurring. To avoid this, switch the display resampling of your raster to 'Nearest Neighbor'. Use the Display tab on the raster layer Properties dialog to do this.