TIP: Click on the map to get details for a tile!
Longitude and latitude coordinates used by GPS devices for defining position on Earth using World Geodetic System defined in 1984 (WGS84).
HINT: WGS84 geodetic datum specify lon/lat (lambda/phi) coordinates on defined ellipsoid shape with defined origin ([0,0] on a prime meridian).
Global projected coordinates in meters for entire planet. Used for raster tile generation in GIS and WM(T)S services.
HINT: Simpler spherical calculation are used instead of ellipsoidal. Mercator map projection deforms size (Greenland vs Africa) and never shows poles.
Zoom-specific pixel coordinates for each level of the pyramid. Top level (zoom=0) has usually 256x256 pixels, next level 512x512, etc.
Devices calculate pixel coordinates at defined zoom level and determine visible viewport for area which should be loaded from servers.
Coordinates of a tile in the pyramid. There is one tile on the top of the pyramid, than 4 tiles, 16 tiles, etc. All tiles have the same size, usually 256x256 pixels.
Only the relevant tiles loaded and displayed for the area of interest / viewport.
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Open Source project for visualisation of all coordinate system of a world. Convert coordinated online, get coordinates from a map in different projections, browse the coordinate database.
Look at Spherical mercator in EPSG.io
Transform coordinates from WGS84 to EPSG.io
Source code for utilities for conversion between tiles and coordinates