What is the importance of tieing control points in georeferencing?

The significance of tying control points in georeferencing primarily lies in establishing a connection between projected and scanned maps. Control points serve as reference locations that are accurately known in both the scanned image and the real-world coordinate system. By properly identifying and aligning these control points, a transformation can be applied to the scanned map so that it accurately represents its corresponding geographic location on the earth's surface.

This connection ensures that spatial data from different sources can align correctly, allowing for more accurate analysis and integration of geographic information. Accurate georeferencing becomes crucial in various applications such as cartography, remote sensing, and urban planning, where the precise location of features is essential.

In this context, while data transformation is indeed part of the process, the main purpose here is about the relationship established by the control points. Enhancing imagery resolution or limiting data processing, although they have their own importance in GIS, are not the primary objectives of tying control points in georeferencing.