staticmap v0.0.4

About

Allows to get static map images.

Installation

$ npm install staticmap

Example

const staticmap = require("staticmap");

staticmap.getMap(staticmap.png({ width: 500, height: 500 }), 45.4724, -73.4520, 12)
  .then((image) => {
    image.save('out1.png');
  })
  .catch((err) => {
    console.log(err);
  });

staticmap.getBox(staticmap.png({ width: 500, height: 500 }), 48.436034, 10.684891, 48.295985, 11.042633)
  .then((image) => {
    image.save('out2.png');
  })
  .catch((err) => {
    console.log(err);
  });

Documentation

staticmap.defaults

Object containing default values of tileUrl and tileSize.

{
  tileUrl: 'http://tile.openstreetmap.org/{z}/{x}/{y}.png',
  tileSize: 256
}

staticmap.create(opts)

Creates new instance of Map class using opts that is an object containing tileUrl and tileSize and proxy properties.

staticmap.png(opts)

Creates instance of Image class that is wrapper for require('node-png').PNG class. You can provide a custom wrapper for an arbitrary image manipulation library.

Custom Image class must contain the following members:

Property: width

Width of image in pixels.

Property: height

Height of image in pixels.

Method: drawImage(data, x, y, callback)

Helper for image manipulation, draws image represented by raw data to current image (at x, y).

Class: Map

Instance of Map class that is used to fetch tiles and to draw them in image.

Method: getMap(image, lat, lon, zoom, callback)

Fetches tiles and draws map with center at lat, lon coordinates. The zoom value of zoom is used to get appropriate tiles.

Optional callback gets two arguments (err, image).

Method: getBox(image, latNW, lonNW, latSE, lonSE, callback)

Property: tileUrl

Property: tileSize

Class: Image

Default class representing resulting images. Image is wrapper for require('node-png').PNG class.

Method: drawImage(data, x, y, callback)

Method: drawLine(x1, y1, x2, y2, color)

Method: pack()

Starts converting data to PNG file Stream.

Method: lonToX(lon)

Function is being added to object automatically. Allows to translate a longitude to x coordinate on this image.

Method: latToY(lat)

Function is being added to object automatically. Allows to translate a latitude to y coordinate on this image.

Property: width

Property: height

Property: png

Instance of require('node-png').PNG class.

License

The MIT License