On the map can be referenced using a value betweenīecause we based world coordinates on the map's tile size, a The map consists of 4 256x256 pixels tiles, resulting in a pixel spaceįrom 512x512. Therefore, each higher zoom level results in a resolution four PixelCoordinate = worldCoordinate * 2 zoomLevelįrom the above equation, note that each increasing zoom levelĭirections. Pixel coordinates are calculated using the following Specific zoom level, whereas world coordinates reflect absolute locations on a Pixel coordinates reference a specific pixel on the map at a Instead are specifications for classes you define yourself.) Pixel coordinates Maps JavaScript API are not classes you subclass but You can define your own projection implementing the If you plot very near the poles, for example. World coordinates outside the base map's usable coordinate space +/- 85 degrees to make the resulting map shape square, which allowsĮasier logic for tile selection. We cut offīase map imagery utilizing the Mercator projection at approximately Width longitudinally but an infinite height latitudinally. 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:

Utm gps coordinates google maps