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MapKnitter

MapKnitter is an open source tool that allows you to combine and position images in geographical space into a composite image map.

This technique is known as orthorectification or georectification to geographers. It 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 might, during the process of positioning the images, overlap many images or identical areas. To solve this problem, MapMill or some kind of sorting is done to determine which source images to use from the original set. Read more of this post