What is one reason for using domains in GIS?

Using domains in GIS is primarily beneficial because they allow you to limit the types of data that can be entered into a field. This is crucial for maintaining data integrity and ensuring that the information collected adheres to specific criteria. By setting domains, such as coded value domains or range domains, you help enforce consistency within your datasets, which in turn streamlines data validation processes and reduces errors during data entry.

The other options touch upon various important aspects of GIS. Enhancing the visual representation of data relates to how data is symbolized on maps, which is typically not directly managed through domains. Converting raster data into vector data is a fundamental GIS operation that involves different types of data processing and does not involve the concept of domains. Lastly, while better storage methods can certainly improve data management practices, they are not the specific purpose of domains which are explicitly intended to control data input.