Orthophoto

• Aerial photos are post-processed to generate orthophotos
• Orthophotos are of uniform scale and provide a mathematically correct representation of ground distances. This makes them valuable to use as reference imagery or as part of a base data set in a map.

• The process of creating orthophotos includes:

  Correcting naturally occurring distortions in the aerial photos resulting from the perspective view of the camera
  
  Positioning aerial photos to real-world coordinates can be done using airborne GPS/IMU systems which for many applications eliminate the need for further ground control information