kkowar / map-tile-functions

Script to convert a WGS84 latitude and longitude into a tile coordinate for a given zoom level

#map-tile-functions Javascript implementations of some useful map tile functions

latLngToTileXY(lat,lng.zoom)

Script to convert a WGS84 latitude and longitude into a slippy map tile coordinate for a given zoom level. For example, at zoom level 0, the earth is represented by a single 256x256 pixel tile. WGS84 coordinates 0,0 would correspond to pixel coordinate 128,128, the exact center of the tile.

This is a javascript implementation of the script found at this OSM Help Page

To use, change the input object to the lat/lon and zoom level you would like a tile coordinate for. Save script.js, then run node script.js. The results will appear in the console.

For Robots: Given a lat/lon, how do I find the precise position on the tile?

boundsFromTile(z,x,y)

Given a zoom, x, and y for a map tile, returns the tile's bounding box in WGS84

Javascript implementation of code found at maptiler.org