Reference systems are critical components in various fields of study. They provide a common language for describing locations and measurements. The synonym for reference systems includes geodetic systems, coordinate systems, and spatial frameworks. Geodetic systems are used to model the Earth's geoid and provide accurate positioning using global navigation satellite systems (GNSS). Coordinate systems are applicable in mathematics, physics, and engineering, where they provide a mathematical framework for describing positions within a space. Spatial frameworks refer to mapping systems that capture information on geographical features, topography, and other data that affect location-based activities. In summary, reference systems are diverse and essential in providing accurate spatial information required in many applications.