Define 'metadata' in the context of GIS.

Metadata in the context of GIS refers to information that describes other data, providing essential details such as the source, accuracy, and context of the geographic data being used. This information is vital for users to understand the quality and limitations of the data, which aids in interpreting and analyzing it effectively. Metadata can include descriptions of how the data were collected, the methods used, the temporal and spatial extent of the data, and any transformations that have been applied. This ensures that users can assess the reliability and relevance of the data for their specific applications.

The other choices do not capture the full essence of what metadata represents in GIS. Data that describes aesthetics of a map focuses on visual elements rather than the underlying information. Encrypted data pertains to security measures and does not specifically relate to the descriptive nature of data. Lastly, data related only to image files is restrictive and does not encompass the broader scope of metadata, which applies to all types of geographic data, not just images.