What is a common example of a coordinate system defined using WKT?

The choice of WGS84 Web Mercator as a common example of a coordinate system defined using Well-Known Text (WKT) is accurate because WKT is a standardized text markup language for representing geometric objects and coordinate systems. WGS84 (World Geodetic System 1984) is a widely used geodetic coordinate system that has become standard for global positioning systems and various mapping applications.

Web Mercator, a specific projection of the WGS84 datum, is extensively utilized in web mapping applications like Google Maps and OpenStreetMap. Its definition in WKT typically includes parameters that articulate the datum, the projection type, and any additional details related to the coordinate reference system.

Other options do not serve as common examples defined in WKT. For instance, NAD83 State Plane refers to a specific set of regional coordinate systems based on the North American Datum 1983 but may not be as universally referenced in a WKT format as Web Mercator. Similarly, while Lambert Conformal is a type of projection, it does not denote a specific coordinate system as clearly and universally as the WGS84 Web Mercator combination.