Use Landsat MSS Aspect to adjust the aspect ratio by applying nearest neighbor resampling to a regular grid. Landsat MSS image data typically contains geometric distortions caused by oversampling in the scan direction. The actual pixel sizes are approximately 79 x 79 meters, but the instrument samples at 57 meter intervals in the scan direction. Because of this oversampling, an adjustment of the aspect ratio by the factor 57/79=0.72 is required.

1. From the Toolbox, select Raster Management > Data-Specific Utilities > Landsat MSS Aspect. The Input File dialog appears.
2. Select an input file and perform optional spatial and spectral subsetting, then click OK. The Aspect Correction Parameters dialog appears.
3. Select output to File or Memory.
4. Click OK.