Rectified photography is usually used to record plain surfaces such as building facades where a line survey is inadequate to incorporate all the details such as subtle changes in materials etc. The photography is usually done using a large format camera and after processing the images they are scanned at high resolution such as 1200 to 2000 dpi. The rectification process involves identifying the control points on the digital images and defining the limit of each image in order to ensure a seamless mosaic of all of the images and planes involved.
