Correct Answer - Option 1 : Rectification
Explanation
Removing geometric distortion from a raster or a vector object. Rectification is usually achieved by aligning raster features or vector coordinate positions with features on a base map or other coordinate reference framework.
1) Tilt displacement
All photos have tilt displacement
- Tilt is caused by the rotation of the camera platform away from the vertical (Aircraft movement)
- A tilted photograph presents a slightly oblique view rather than a true vertical record.
- This type of displacement typically occurs along the axis of the wings or the flight line
- Tilt displacement radiates from the isocenter of the photo and causes objects to be displaced radially towards the isocenter.
- If the amount and direction of tilt are known then the photo may be rectified
2) Topographic displacement
This is the most serious type of displacement.
- This displacement radiates outward from center of the photograph.
- Topographic displacement is caused by the perspective geometry of the camera and the terrain at varying elevations.
- Topographic displacement varies directly with the radial distance from the photo center to the object
