openlayers
Version:
Build tools and sources for developing OpenLayers based mapping applications
62 lines (55 loc) • 2 kB
JavaScript
goog.provide('ol.source.XYZ');
goog.require('ol');
goog.require('ol.source.TileImage');
goog.require('ol.tilegrid');
/**
* @classdesc
* Layer source for tile data with URLs in a set XYZ format that are
* defined in a URL template. By default, this follows the widely-used
* Google grid where `x` 0 and `y` 0 are in the top left. Grids like
* TMS where `x` 0 and `y` 0 are in the bottom left can be used by
* using the `{-y}` placeholder in the URL template, so long as the
* source does not have a custom tile grid. In this case,
* {@link ol.source.TileImage} can be used with a `tileUrlFunction`
* such as:
*
* tileUrlFunction: function(coordinate) {
* return 'http://mapserver.com/' + coordinate[0] + '/' +
* coordinate[1] + '/' + coordinate[2] + '.png';
* }
*
*
* @constructor
* @extends {ol.source.TileImage}
* @param {olx.source.XYZOptions=} opt_options XYZ options.
* @api stable
*/
ol.source.XYZ = function(opt_options) {
var options = opt_options || {};
var projection = options.projection !== undefined ?
options.projection : 'EPSG:3857';
var tileGrid = options.tileGrid !== undefined ? options.tileGrid :
ol.tilegrid.createXYZ({
extent: ol.tilegrid.extentFromProjection(projection),
maxZoom: options.maxZoom,
minZoom: options.minZoom,
tileSize: options.tileSize
});
ol.source.TileImage.call(this, {
attributions: options.attributions,
cacheSize: options.cacheSize,
crossOrigin: options.crossOrigin,
logo: options.logo,
opaque: options.opaque,
projection: projection,
reprojectionErrorThreshold: options.reprojectionErrorThreshold,
tileGrid: tileGrid,
tileLoadFunction: options.tileLoadFunction,
tilePixelRatio: options.tilePixelRatio,
tileUrlFunction: options.tileUrlFunction,
url: options.url,
urls: options.urls,
wrapX: options.wrapX !== undefined ? options.wrapX : true
});
};
ol.inherits(ol.source.XYZ, ol.source.TileImage);