Which of the following spheroids is considered the most precise for geographic applications?

The WGS 1984 spheroid is widely regarded as the most precise for geographic applications, particularly in global positioning systems (GPS) and other modern geospatial data management. It was designed to serve as a reference frame that accurately represents the shape of the Earth for global applications and has been refined to accommodate advancements in satellite technology, which requires precise measurements for navigation and mapping.

WGS 1984 is based on satellite data and is continually updated, making it the standard for many global applications in geospatial science. Its integration with GPS technology means that most users of geographic data rely on this spheroid for accurate location and mapping.

In contrast, the other spheroids listed, such as Clarke 1866, GRS 1980, and GRS 1995, while historically significant and used in various regional applications, do not match the global accuracy and modern relevance of WGS 1984 in the context of contemporary geographic information systems.