Which service allows users to interact with GIS data through a web interface?

The Map Viewer is a web application specifically designed for visualizing and interacting with GIS data through an intuitive web interface. It provides users with the capability to explore geographic information, create and customize maps, and perform spatial analyses without needing extensive GIS software installed on their local systems. This service is user-friendly and facilitates functionalities such as zooming, panning, and layer manipulation, which are essential for effective geospatial analysis.

In contrast, GeoJSON is a format for encoding geographic data structures and does not provide an interactive interface for users. The Web Map Service (WMS) is a standard for serving georeferenced map images over the Internet, but it primarily focuses on delivering visual representations of spatial data rather than allowing full interaction with the data. The Web Feature Service (WFS) allows users to access and manipulate geospatial features and provides the ability to perform queries on the features, but it does not offer a user-friendly interface like a Map Viewer would.