What formula is used to convert coordinates from WGS84 to decimal (lat long)?

Question

Cartography

What formula is used to convert coordinates from WGS84 to decimal? And what is the actual difference - as I understand it exactly, and the first type is the coordinates of geodesy?

Answer 1

WGS84 is not a coordinate, it's an ellipsoid. And the coordinates most likely mean:
- EPSG:4326 - geographical coordinates on the WGS84 ellipsoid in degrees.
- EPSG:3857 (WGS84 World Pseudo-Mercator, Google Mercator) - the globe (a sphere, not an ellipsoid) without polar caps (from 85.06 to 90 degrees of latitude) is represented as a square with a side of 20037508.3427892 meters (number "pi" multiplied by the radius of the Earth 6378137 meters). The unit of measurement is meters. This is the most common coordinate system on the web, popularized by Google, but unloved by professionals (the Earth is not a ball !!! 111! 1 !!), it didn’t even have its own EPSG number for many years (which is why virtual numbers like 900913, 102100, etc. were used .).
- EPSG:3395(WGS84 World Mercator) - almost the same, but on an ellipsoid and from -80 to 84 latitudes, also in meters. Used, for example, in Yandex Maps and kosmosnimki.ru.

Answer 2

lat/lon = WGS84 * 1;