google-maps-coords

Convert Google Maps Coordinates without Google Maps. Handles conversions between lat long, point, and px.

var coords = require('google-maps-coords');

var zoom = 12; // zoom level of Google Maps
var LL = [43.669662, -79.282848]; // Latitude and Longitude
var PX = [293359.96770986664, 382616.79057958454];
var POINT = [71.62108586666666, 93.41230238759388];

coords.llToPX(LL, zoom);
coords.llToPoint(LL);
coords.pxToLL(PX, zoom);
coords.pxToPoint(PX, zoom);
coords.pointToPX(POINT, zoom);
coords.pointToLL(POINT);

Usage

var coords = require('google-maps-coords');

Will return an object with the conversion functions. The functions are:

• llToPX(latLong, zoom)
• llToPoint(latLong)
• pxToLL(latLong, zoom)
• pxToPoint(pxCoord, zoom)
• pointToPX(point, zoom)
• pointToLL(point)

These functions can individually be required: var llToPX = require('google-maps-coords/llToPX');

coords.llToPX(latLong, zoom)

Converts latitude and longitude values to pixel values. latLong is an Array where the first index is latitude and second is longitude. zoom is the zoom level of the map for instance Google Maps zoom levels are between: 0-18.

The return value will be an array [x, y].

coords.llToPoint(latLong)

Converts a latitude and longitude to a point. The format of latLong is described in the documentation for coords.llToPX(latLong, zoom).

coords.pxToLL(latLong, zoom)

Converts a latitude and longitude to a pixel cordinate. The format of latLong and zoom are described in the documentation for coords.llToPX(latLong, zoom).

coords.pxToPoint(pxCoord, zoom)

Converts pixel values to Point values. pxCoord will be an array [x, y]. zoom is described in the documentation for coords.llToPX(latLong, zoom).

Converts a latitude a

coords.pointToPX(point, zoom)

Converts Point values to pixel values. zoom is described in the documentation for coords.llToPX(latLong, zoom).

coords.pointToLL(point)

Converts a point to a latitude and longitude.

License

MIT, see LICENSE.md for details.