What kind of imagery does the .img file extension represent?

The .img file extension is commonly associated with georeferenced raster data, including aerial imagery and satellite imagery. Typically, these files store pixel data that represent visual information from the Earth's surface, which can include photographs taken from various heights and angles.

While aerial imagery can indeed be a common use of .img files, the most accurate characterization is that they often represent a broader category of raster data that can include various types of images with spatial references. This makes the .img format versatile for applications in mapping and analysis within GIS software, allowing users to visualize, manipulate, and extract metrics from the geographical data represented.

The distinction lies in the various forms that .img files can take. For instance, they may also be used for satellite images that contain spectral information, which is essential for remote sensing applications. This flexibility enhances the utility of the .img format in GIS, enabling users to engage with diverse data types as needed.