Coordinates in cartographic systems are traditionally fixed point, decimal or binary depending on the system. Many sources are internally quantized to meter res

Coordinates in cartographic systems are traditionally fixed point, decimal or binary depending on the system. Many sources are internally quantized to meter resolution, though some newer ones are quantized to centimeter resolution. Because so much of this data is presented as floating point, it introduces a lot of apparent false precision. The limits of practical precision for a fixed point on Earth is around 10 cm regardless of the measurement technique. Anything more precise than that is generally not reproducible. Fixed points on Earth will often quasi-randomly deviate from their median position by multiple centimeters over periods of hours regardless of the reference frame. In modern geospatial systems, it is not uncommon to have 1-cm defined as the physics floor such that any additional implied positioning precision can be disregarded or discarded for computational purposes.