It is a process of locating an entity in real world coordinates. It aligns geographic data to a known coordinate system representing earth defined through projection systems so it can be viewed, queried, and analyzed with other geographic data.

To Geo-referencing a geographic data, the positions of known points, called control points, are determined. The Ground Control Points (GCPs) are defined as the points with known Geo-referencing l location, whose positions on map correspond to their positions on earth.

GCPs are collected from fixed objects and are marked on the data to be Geo-referencing that define where the data is on earth. The whole data adjusts itself according to these GCPs. At least three control points are required for Geo-referencing a data. Additional control points help increasing the accuracy. Once the data is Geo-referencing, each point has a coordinate associated to it which means the location of any object in the data (map) can now be determined.

GeoNxt has capable of Geo-reference of raster maps, satellite Imageries, and other vector data which doesn’t had co-ordinate system in hues quantity.