10.07.2015 Views

User Manual - pancroma

User Manual - pancroma

User Manual - pancroma

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presented. Check the ‘Compute Linear Regression’ check box. A drop downCombo Box will become visible. You may select the sampling parameter. Thedefault is 1, meaning that every pixel is included in the computation. If you selecta higher resampling parameter the row and column counter will increment by thevalue selected, resulting in a lower number of pixels being included in thecomputation.Select ‘OK’ and the plot will be generated. The regression statistics will bereported to the diagnostic screen and the slope and intercept values will appearon the plot. Note that zero values are ignored so that collar pixels do not skewthe regression intercept.IMPORTANT NOTE: Beware of running regression analysis on images with nodata (black) collars. If the data areas do not match exactly PANCROMA TM mayhave difficulty rationalizing the unequal data counts between the two images. Itis best to use subset images or at least check your result against subset images.This utility will use 16-bit math for Landsat 8 data.204

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