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How to get the indexes of a WMTS tile?
I wanted to know how to get the indexes (x,y) of a WMTS tile for a given geolocation (latitude, longitude) and zoom level. For exemple, I have a POI located at (48.675, 2.7), I want to get the corresponding open-street-map tile for the zoom 10.
How are the coordinates of a tile determined?
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.
How are coordinates used to make flat maps?
People are using coordinate systems and map projections to transform the shape of Earth into usable flat maps for centuries. A map of the entire world is too big to be directly displayed in a computer so there is a clever mechanism for quick browsing and zooming on maps: the map tiles.
How are the tiles used in Google Maps?
A map of the entire world is too big to be directly displayed in a computer so there is a clever mechanism for quick browsing and zooming on maps: the map tiles. The world is divided into small squares, each with fixed geographic area and scale.
When a map scrolls to a new location, or to a new zoom level, the API determines which tiles are needed using pixel coordinates, and translates those values into a set of tiles to retrieve. These tile coordinates are assigned using a scheme which makes it logically easy to determine which tile contains the imagery for any given point.
How are tiles indexed in Google Maps JavaScript?
Tiles are indexed using x,y coordinates from that origin. For example, at zoom level 2, when the earth is divided up into 16 tiles, each tile can be referenced by a unique x,y pair:
How does the API translate latitude and longitude to world coordinates?
World coordinates. Whenever the API needs to translate a location in the world to a location on a map, it first translates latitude and longitude values into a world coordinate. The API uses the Mercator projection to perform this tranlsation.