ghettovoice/ol-tilecache

OpenLayers tile url function to load tile seeded with TileCache URL scheme

TileCache url function for OpenLayers

Allows create custom ol.TileUrlFunctionType to load tiles seeded with TileCache.

Installation

Install it with NPM (recommended):

# ES6 version for bundling with Webpack, Rollup and etc.
npm install ol ol-tilecache

// Use as ES2015 module (based on NPM package `ol`)
import Map from 'ol/Map'
...
import * as TileCacheUrlFn from 'ol-tilecache'
// or only what you need
import { createTileUrlFunction } from 'ol-tilecache'

Or add from CDN:

<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.0.0/build/ol.js"></script>
<script src="https://unpkg.com/ol-tilecache@latest/dist/ol-tilecache.umd.js"></script>
<script>
  // plugin exports global variable TileCacheUrlFn
  // in addition it also exported to `ol.tileCacheUrlFn` field (for backward compatibility).
</script>

Usage

Usage same as standard OpenLayers tile url functions.

Members

createTileUrlFunction

Arguments

• url : string URL template
• tileGrid : ol.tilegrid.TileGrid Custom tile grid. Default is EPSG:3857 x/y/z grid

Returns: ol.TileUrlFunctionType

Available URL placeholders:

z | 0z - zoom level (simple number or padded with zero)
x1, x2, x3 - X axis index parts (remnant from dividing the tile X index on 10^9 broken down by 3 digits)
y1, y2, y3 - Y axis index parts (remnant from dividing the tile Y index on 10^9 broken down by 3 digits)
-y1, -y2, -y3 - inverted Y axis index parts (remnant from dividing the tile Y index on 10^9 broken down by 3 digits)

Example usage:

import Map from 'ol/Map'
import View from 'ol/View'
import TileLayer from 'ol/layer/Tile'
import XyzSource from 'ol/source/XYZ'
import { createTileUrlFunction } from 'ol-tilecache'

const map = new Map({
  target: 'map',
  view: new View({
    projection: 'EPSG:3857',
    center: [ 4189972.14, 7507950.67 ],
    zoom: 5
  }),
  layers: [
    new TileLayer({
      source: new XyzSource({
        tileUrlFunction: createTileUrlFunction('http://{a-z}.tiles.org/{0z}/{x1}/{x2}/{x3}/{-y1}/{-y2}/{-y3}.png')
      })
    })
  ]
})

Build

git clone https://github.com/ghettovoice/ol-tilecache.git
npm install
# build
npm run build
# run test app
npm start
# run unit tests
npm test

License

MIT (c) 2016-2020, Vladimir Vershinin