MapKnitter is a free and open source tool for combining and positioning images in geographic space into a composite image map. Known as “orthorectification” or “georectification” to geographers this step covers the process of figuring out where images can be placed on an existing map and how they can be combined or “stitched” together. You are likely to have many images of overlapping or identical Areas which is why MapMill or some type of sorting is used to determine which source images to use from the original set
