Which of the following data types can be georeferenced?

Georeferencing is the process of aligning spatial data to a known coordinate system so that it can be viewed, queried, and analyzed in relation to other geographic data. Unreferenced scanned maps are typically made up of image files that represent geographical information but lack inherent spatial coordinates. By georeferencing these scanned maps, you can assign real-world coordinates to the image, thus allowing it to be overlaid with other geographic data layers that are already geographically referenced.

This capability of unreferenced scanned maps to be georeferenced is crucial in applications where older maps or historical data need to be integrated into modern GIS systems. Techniques such as matching control points on the scanned image to corresponding points on a referenced layer enable this process. Thus, the ability to georeference unreferenced scanned maps makes them a key data type in GIS work.

The other types of data mentioned, such as database tables and statistical summaries, often represent non-spatial information or aggregated data that cannot be directly placed in geographic space without additional spatial attributes. Color-coded rasters are already spatially aware but may represent thematic information rather than being candidates for georeferencing themselves. Therefore, only unreferenced scanned maps fit the criteria for georeferencing directly as they require this process