Which service should be utilized to make a large collection of raster data accessible on the web?

The choice of an image service is the most suitable for making a large collection of raster data accessible on the web. Image services are designed specifically to handle raster data, allowing for efficient storage, management, and sharing of this type of data over the internet. They optimize raster datasets for web access, enabling users to display large imagery datasets seamlessly within web applications.

When using an image service, users benefit from functionalities such as dynamic map creation, on-the-fly processing, and the ability to serve various image formats. This makes them ideal for scenarios involving large aerial imagery, satellite images, or any raster datasets that may need to be visualized interactively.

Other services mentioned have different purposes that do not align as well with the requirement to make raster data widely accessible. For example, a geodata service is aimed at managing geodatabase features and needs more configuration for raster data. The network analysis service focuses on performing analyses related to transportation and networks, while the WCS (Web Coverage Service) is intended for serving raster data but is more specific to scientific data sharing rather than widespread web accessibility and visualization that an image service provides.