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Geographic Information Systems (GIS)

Georeferencing is the process of assigning x, y coordinates to a raster file, such as an aerial photograph, scanned historical map, etc. so GIS software can place the resulting georeferenced file in its specified location on a map. The georeferencing process involves assigning control points to the raster image and matching them to control points on an existing georeferenced data set.

Georeferencing Tutorials

Maps & Gazetteers

Looking for maps or gazetteers? Check out our Maps, Atlas, and Gazetteers guide.