goog.provide('ol.source.OSM');
goog.require('ol');
goog.require('ol.Attribution');
goog.require('ol.source.XYZ');
/**
* @classdesc
* Layer source for the OpenStreetMap tile server.
*
* @constructor
* @extends {ol.source.XYZ}
* @param {olx.source.OSMOptions=} opt_options Open Street Map options.
* @api stable
*/
ol.source.OSM = function(opt_options) {
var options = goog.isDef(opt_options) ? opt_options : {};
var attributions;
if (goog.isDef(options.attributions)) {
attributions = options.attributions;
} else {
attributions = [ol.source.OSM.ATTRIBUTION];
}
var crossOrigin = goog.isDef(options.crossOrigin) ?
options.crossOrigin : 'anonymous';
var protocol = ol.IS_HTTPS ? 'https:' : 'http:';
var url = goog.isDef(options.url) ?
options.url : protocol + '//{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png';
goog.base(this, {
attributions: attributions,
crossOrigin: crossOrigin,
opaque: true,
maxZoom: goog.isDef(options.maxZoom) ? options.maxZoom : 19,
tileLoadFunction: options.tileLoadFunction,
url: url
});
};
goog.inherits(ol.source.OSM, ol.source.XYZ);
/**
* @const
* @type {ol.Attribution}
* @api
*/
ol.source.OSM.ATTRIBUTION = new ol.Attribution({
html: '© ' +
'<a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> ' +
'contributors.'
});