Image to Image Georeferencing in ArcGIS Pro ( for Aerial Photographs and Satellite Imagery)

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Georeferencing is a process to reference geospatial data into known and standardized coordinate system. Georeferencing is part of basic task that all GIS users must have ability to do it. Georeferencing can be done in 2D plane or 3D plane, and it can be applied into raster data and vector data. For Raster data, it could be georeferencing aerial photographs, satellite imagery, or scanned maps in image format. For Vector data, georeferencing usually is called spatial adjustment. Most of GIS and remote sensing software available on the market has this georeferencing ability, either for vector data or raster data. 

As I already mentioned above, Georeferencing for raster data can be classified into two kinds of raster data. First is Scanned Maps in Image/PDF format, and second is for Satellite Imagery or Aerial Photographs. For earch type of data, the georeferencing procedures are little bit different. In this article I will talks about georeferencing satellite imagery and aerial photographs. Georeferencing imagery is trickier than the scanned maps because you dont have exact ground control points (GCP) references. So you must rely to another imagery that already georeferenced or you must collect GPS coordinate in the field, then use them as the GCP references in the georeferencing process. If you have other imagery that already georeferenced and covering same area with your target image, you can perform Image to Image Georeferencing. In ArcGIS pro this Image to Image Georeferencing even can be done automatically. So if you have to do Image to Image Georeferencing in your GIS workflow, here is a video tutorial about how to do it in ArcGIS Pro. I am using ArcGIS pro, but the principles is similar with other software


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