What is the purpose of orthoectivation?

The purpose of orthoactivation is primarily focused on removing the effects of relief displacement in aerial imagery, which involves correcting distortions caused by the terrain. This process ensures that the geometric properties of the image reflect the true positions of features on the Earth's surface. By achieving a uniform scale, orthoactivated images allow for accurate measurements and comparisons with other spatial data, making it possible to overlay these images onto a map accurately. This is particularly important in GIS applications where precise spatial analysis is required, such as urban planning, land use management, and environmental monitoring. In summary, orthoactivation enhances the usability of aerial photographs by eliminating distortions, allowing them to be used effectively as reliable spatial data sources.