Image to Map Rectification

The process of rectifying an image to a maps coordinate system has its advantage and disadvantages. The advantages after matching ground control points in the mapping system to points in the image is the elimination of errors in the data in a GIS. After the rectification process, cultural features are now assigned with accurate coordinates.The disadvantages in the process occur when the images lacks identifiable features making it difficult to locate a ground control point. Also, user error when placing ground control points can distort the image and make a mess out of the whole process.