Note that a Mercator projection has a finite Because theīasic Mercator Google Maps tile is 256 x 256 pixels, the usable The y direction towards the south (down). The x direction towards the east (right) and increase in Longitude and approximately 85 degrees latitude) and increase in Projection's origin (the northwest corner of the map at 180 degrees

World coordinates in Google Maps are measured from the Mercator

A world coordinate is independent of the current zoom level, It may be much more precise than the current resolution of the map imageīeing shown. Note that since this value is a floating point value, Point value measured from the origin of the map projection to the Level 0, using the projection to convert latitudes and longitudes to We then define world coordinates relative to pixel coordinates at zoom We assume a map at zoom level 0 is a single tile of the base tile size. Whenever the API needs to translate a location in the world to a location onĪ map, it first translates latitude and longitude values into aįor convenience in the calculation of pixel coordinates (see below)

Tile coordinates, which reference a specific tile on the map at a.

Pixel coordinates, which reference a specific pixel on the map at a.

World coordinates, which reference a point on the map uniquely.

Latitude and longitude values, which reference a point on the.

The Maps JavaScript API uses the following coordinate systems:

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