https://epsg.io/
EPSG.io: Coordinate Systems Worldwide
EPSG.io: Coordinate systems worldwide (EPSG/ESRI), preview location on a map, get transformation, WKT, OGC GML, Proj.4. https://EPSG.io/ made by @klokantech
coordinate systemsepsgioworldwide
https://developer.mozilla.org/en-US/docs/Web/API/CSSOM_view_API/Coordinate_systems
Coordinate systems - Web APIs | MDN
When specifying the location of a pixel in a graphics context (just like when specifying coordinate systems in algebra), its position is defined relative to a...
coordinate systemsweb apismdn