What does WGS84 primarily serve as in geospatial systems?

WGS84, or World Geodetic System 1984, is designed as a global reference system that provides consistent geolocation across various geographic locations. It is utilized extensively in GPS and other geospatial technologies to ensure that positional data from different sources aligns correctly on a worldwide scale. By employing a consistent datum and reference frame, WGS84 enables users and systems to accurately determine latitude, longitude, and elevation anywhere on Earth, thereby facilitating interoperability and communication among diverse geographic data systems. This global standard is crucial for applications requiring accurate positioning, like navigation, mapping, and geospatial analysis. The other choices do not accurately capture the primary function of WGS84; it is not limited to local or regional applications, nor is it primarily focused on data normalization or public data sharing.