Many images used in IMAGINE cover a large area, while the actual area being studied can only cover a small portion of the image. To save on disk space and processing time, you can make new images out of a subset of the entire data set.
In this workflow, you use the Subset dialog to take a subset of a small urbanized Area of Interest (AOI) from a larger scene of Washington, DC. One workflow demostrates the results when the subset pixels are not snapped to the pixel grid of the original image, and another workflow demostrates the results when subset pixels are snapped.