ortophoto
An ortophoto is a photograph that has been geometrically corrected to remove lens distortion and perspective effects. Unlike a standard aerial photograph, an ortophoto has a uniform scale throughout, meaning measurements can be taken directly from it with accuracy. This correction is achieved by using a digital elevation model (DEM) of the terrain. The process essentially reprojects the aerial photograph onto a flat plane, accounting for variations in elevation.
The primary purpose of an ortophoto is to provide a spatially accurate and georeferenced image that can