tile-dl-client

Download map tiles in the browser to a .tar file.

Uses window.caches to support downloads without memory limits, which only works in late versions of Google Chrome.

Install

npm install tile-dl-client

Example

Run npm test and see the code in example/.

Usage

var download = require('tile-dl-client')

var opts = {
  minZoom: 4,
  maxZoom: 5,
  path: '/export/mytiles.tar'
}

Bounds can be specified with minimum and maximum lats and lons directly:

{
  minLat: 58.516,
  maxLat: 57.9095,
  maxLng: -6.1357,
  minLng: -7.1354,
}

OR using bounds,

bounds = [
  -7.1354, 58.516,-6.1357, 57.9095
]

And then pass these options and the URL. The callback is called when the tiles are finished downloading.

function done (err) {
  if (err) throw err
  alert('Done!')
})

function onprogress (p) {
  console.log(`${p}%`)
}

download(url, opts, done, onprogress)

You'll probably want to then use a service worker or some other method to get use the offline tiles after that point. See the example directory for the recommended way to download these files to the user's download folder.

License

MIT