<Tr> <Td> NAVD 88 </Td> <Td> N. American Vertical Datum 1988 </Td> </Tr> <Tr> <Td> ETRS89 </Td> <Td> European Terrestrial Reference System 1989 </Td> </Tr> <Tr> <Td> GCJ - 02 </Td> <Td> Chinese encrypted datum 2002 </Td> </Tr> <Ul> <Li> International Terrestrial Reference System </Li> <Li> Spatial Reference System Identifier (SRID) </Li> <Li> Universal Transverse Mercator (UTM) </Li> </Ul>

One degree of longitude on the equator is equal to a distance of