124 lines
2.6 KiB
JavaScript
124 lines
2.6 KiB
JavaScript
/**
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* @module ol/source/Stamen
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*/
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import {inherits} from '../index.js';
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import OSM from '../source/OSM.js';
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import XYZ from '../source/XYZ.js';
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/**
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* @classdesc
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* Layer source for the Stamen tile server.
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*
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* @constructor
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* @extends {ol.source.XYZ}
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* @param {olx.source.StamenOptions} options Stamen options.
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* @api
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*/
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var Stamen = function(options) {
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var i = options.layer.indexOf('-');
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var provider = i == -1 ? options.layer : options.layer.slice(0, i);
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var providerConfig = Stamen.ProviderConfig[provider];
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var layerConfig = Stamen.LayerConfig[options.layer];
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var url = options.url !== undefined ? options.url :
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'https://stamen-tiles-{a-d}.a.ssl.fastly.net/' + options.layer +
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'/{z}/{x}/{y}.' + layerConfig.extension;
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XYZ.call(this, {
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attributions: Stamen.ATTRIBUTIONS,
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cacheSize: options.cacheSize,
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crossOrigin: 'anonymous',
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maxZoom: options.maxZoom != undefined ? options.maxZoom : providerConfig.maxZoom,
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minZoom: options.minZoom != undefined ? options.minZoom : providerConfig.minZoom,
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opaque: layerConfig.opaque,
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reprojectionErrorThreshold: options.reprojectionErrorThreshold,
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tileLoadFunction: options.tileLoadFunction,
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url: url,
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wrapX: options.wrapX
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});
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};
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inherits(Stamen, XYZ);
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/**
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* @const
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* @type {Array.<string>}
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*/
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Stamen.ATTRIBUTIONS = [
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'Map tiles by <a href="https://stamen.com/">Stamen Design</a>, ' +
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'under <a href="https://creativecommons.org/licenses/by/3.0/">CC BY' +
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' 3.0</a>.',
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OSM.ATTRIBUTION
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];
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/**
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* @type {Object.<string, {extension: string, opaque: boolean}>}
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*/
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Stamen.LayerConfig = {
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'terrain': {
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extension: 'jpg',
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opaque: true
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},
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'terrain-background': {
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extension: 'jpg',
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opaque: true
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},
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'terrain-labels': {
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extension: 'png',
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opaque: false
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},
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'terrain-lines': {
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extension: 'png',
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opaque: false
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},
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'toner-background': {
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extension: 'png',
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opaque: true
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},
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'toner': {
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extension: 'png',
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opaque: true
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},
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'toner-hybrid': {
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extension: 'png',
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opaque: false
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},
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'toner-labels': {
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extension: 'png',
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opaque: false
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},
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'toner-lines': {
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extension: 'png',
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opaque: false
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},
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'toner-lite': {
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extension: 'png',
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opaque: true
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},
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'watercolor': {
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extension: 'jpg',
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opaque: true
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}
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};
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/**
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* @type {Object.<string, {minZoom: number, maxZoom: number}>}
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*/
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Stamen.ProviderConfig = {
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'terrain': {
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minZoom: 4,
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maxZoom: 18
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},
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'toner': {
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minZoom: 0,
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maxZoom: 20
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},
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'watercolor': {
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minZoom: 1,
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maxZoom: 16
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}
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};
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export default Stamen;
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