The document summarizes a project to characterize changes to three islands in the Niagara River over time by rectifying current and historic satellite images. Current images from 2011 were obtained from an online database. Older images from 1978 and 1927 were obtained from a university website. The 2011 images were rectified to the 1978 and 1927 images to align them to the same coordinate system, allowing accurate analysis of habitat changes across the time periods. Some errors are inherent in the rectification process due to differences in image quality and landscapes over time, but it is an improvement over comparing images without alignment. The rectified images will allow measurement of distance and area changes for analysis of habitat loss on the islands.