Add existing to tracked
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import Check from "../Core/Check.js";
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import Frozen from "../Core/Frozen.js";
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import Credit from "../Core/Credit.js";
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import defined from "../Core/defined.js";
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import Resource from "../Core/Resource.js";
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import IonResource from "../Core/IonResource.js";
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import UrlTemplateImageryProvider from "./UrlTemplateImageryProvider.js";
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const trailingSlashRegex = /\/$/;
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/**
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* @typedef {object} Azure2DImageryProvider.ConstructorOptions
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*
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* Initialization options for the Azure2DImageryProvider constructor
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*
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* @property {string} subscriptionKey The public subscription key for the imagery.
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* @property {string} [url="https://atlas.microsoft.com/"] The Azure server url.
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* @property {string} [tilesetId="microsoft.imagery"] The Azure tileset ID. Valid options are {@link microsoft.imagery}, {@link microsoft.base.road}, and {@link microsoft.base.labels.road}
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* @property {Ellipsoid} [ellipsoid=Ellipsoid.default] The ellipsoid. If not specified, the default ellipsoid is used.
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* @property {number} [minimumLevel=0] The minimum level-of-detail supported by the imagery provider. Take care when specifying
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* this that the number of tiles at the minimum level is small, such as four or less. A larger number is likely
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* to result in rendering problems.
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* @property {number} [maximumLevel=22] The maximum level-of-detail supported by the imagery provider.
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* @property {Rectangle} [rectangle=Rectangle.MAX_VALUE] The rectangle, in radians, covered by the image.
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*/
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/**
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* Provides 2D image tiles from Azure.
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*
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* @alias Azure2DImageryProvider
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* @constructor
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* @param {Azure2DImageryProvider.ConstructorOptions} options Object describing initialization options
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*
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* @example
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* // Azure 2D imagery provider
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* const azureImageryProvider = new Cesium.Azure2DImageryProvider({
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* subscriptionKey: "subscription-key",
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* tilesetId: "microsoft.base.road"
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* });
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*/
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function Azure2DImageryProvider(options) {
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options = options ?? {};
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const tilesetId = options.tilesetId ?? "microsoft.imagery";
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this._maximumLevel = options.maximumLevel ?? 22;
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this._minimumLevel = options.minimumLevel ?? 0;
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this._subscriptionKey =
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options.subscriptionKey ?? options["subscription-key"];
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//>>includeStart('debug', pragmas.debug);
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Check.defined("options.subscriptionKey", this._subscriptionKey);
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//>>includeEnd('debug');
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this._tilesetId = options.tilesetId;
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const resource =
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options.url instanceof IonResource
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? options.url
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: Resource.createIfNeeded(options.url ?? "https://atlas.microsoft.com/");
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let templateUrl = resource.getUrlComponent();
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if (!trailingSlashRegex.test(templateUrl)) {
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templateUrl += "/";
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}
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const tilesUrl = `${templateUrl}map/tile`;
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this._viewportUrl = `${templateUrl}map/attribution`;
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resource.url = tilesUrl;
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resource.setQueryParameters({
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"api-version": "2024-04-01",
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tilesetId: tilesetId,
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"subscription-key": this._subscriptionKey,
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zoom: `{z}`,
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x: `{x}`,
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y: `{y}`,
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});
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this._resource = resource;
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let credit;
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if (defined(options.credit)) {
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credit = options.credit;
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if (typeof credit === "string") {
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credit = new Credit(credit);
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}
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}
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const provider = new UrlTemplateImageryProvider({
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...options,
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maximumLevel: this._maximumLevel,
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minimumLevel: this._minimumLevel,
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url: resource,
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credit: credit,
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});
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provider._resource = resource;
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this._imageryProvider = provider;
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// This will be defined for ion resources
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this._tileCredits = resource.credits;
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this._attributionsByLevel = undefined;
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}
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Object.defineProperties(Azure2DImageryProvider.prototype, {
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/**
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* Gets the URL of the Azure 2D Imagery server.
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* @memberof Azure2DImageryProvider.prototype
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* @type {string}
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* @readonly
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*/
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url: {
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get: function () {
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return this._imageryProvider.url;
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},
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},
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/**
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* Gets the rectangle, in radians, of the imagery provided by the instance.
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* @memberof Azure2DImageryProvider.prototype
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* @type {Rectangle}
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* @readonly
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*/
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rectangle: {
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get: function () {
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return this._imageryProvider.rectangle;
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},
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},
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/**
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* Gets the width of each tile, in pixels.
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* @memberof Azure2DImageryProvider.prototype
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* @type {number}
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* @readonly
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*/
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tileWidth: {
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get: function () {
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return this._imageryProvider.tileWidth;
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},
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},
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/**
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* Gets the height of each tile, in pixels.
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* @memberof Azure2DImageryProvider.prototype
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* @type {number}
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* @readonly
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*/
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tileHeight: {
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get: function () {
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return this._imageryProvider.tileHeight;
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},
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},
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/**
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* Gets the maximum level-of-detail that can be requested.
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* @memberof Azure2DImageryProvider.prototype
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* @type {number|undefined}
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* @readonly
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*/
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maximumLevel: {
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get: function () {
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return this._imageryProvider.maximumLevel;
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},
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},
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/**
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* Gets the minimum level-of-detail that can be requested. Generally,
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* a minimum level should only be used when the rectangle of the imagery is small
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* enough that the number of tiles at the minimum level is small. An imagery
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* provider with more than a few tiles at the minimum level will lead to
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* rendering problems.
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* @memberof Azure2DImageryProvider.prototype
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* @type {number}
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* @readonly
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*/
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minimumLevel: {
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get: function () {
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return this._imageryProvider.minimumLevel;
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},
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},
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/**
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* Gets the tiling scheme used by the provider.
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* @memberof Azure2DImageryProvider.prototype
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* @type {TilingScheme}
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* @readonly
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*/
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tilingScheme: {
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get: function () {
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return this._imageryProvider.tilingScheme;
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},
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},
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/**
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* Gets the tile discard policy. If not undefined, the discard policy is responsible
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* for filtering out "missing" tiles via its shouldDiscardImage function. If this function
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* returns undefined, no tiles are filtered.
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* @memberof Azure2DImageryProvider.prototype
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* @type {TileDiscardPolicy}
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* @readonly
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*/
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tileDiscardPolicy: {
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get: function () {
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return this._imageryProvider.tileDiscardPolicy;
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},
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},
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/**
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* Gets an event that is raised when the imagery provider encounters an asynchronous error.. By subscribing
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* to the event, you will be notified of the error and can potentially recover from it. Event listeners
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* are passed an instance of {@link TileProviderError}.
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* @memberof Azure2DImageryProvider.prototype
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* @type {Event}
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* @readonly
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*/
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errorEvent: {
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get: function () {
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return this._imageryProvider.errorEvent;
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},
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},
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/**
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* Gets the credit to display when this imagery provider is active. Typically this is used to credit
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* the source of the imagery.
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* @memberof Azure2DImageryProvider.prototype
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* @type {Credit}
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* @readonly
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*/
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credit: {
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get: function () {
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return this._imageryProvider.credit;
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},
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},
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/**
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* Gets the proxy used by this provider.
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* @memberof Azure2DImageryProvider.prototype
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* @type {Proxy}
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* @readonly
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*/
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proxy: {
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get: function () {
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return this._imageryProvider.proxy;
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},
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},
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/**
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* Gets a value indicating whether or not the images provided by this imagery provider
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* include an alpha channel. If this property is false, an alpha channel, if present, will
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* be ignored. If this property is true, any images without an alpha channel will be treated
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* as if their alpha is 1.0 everywhere. When this property is false, memory usage
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* and texture upload time are reduced.
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* @memberof Azure2DImageryProvider.prototype
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* @type {boolean}
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* @readonly
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*/
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hasAlphaChannel: {
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get: function () {
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return this._imageryProvider.hasAlphaChannel;
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},
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},
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});
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/**
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* Gets the credits to be displayed when a given tile is displayed.
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*
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* @param {number} x The tile X coordinate.
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* @param {number} y The tile Y coordinate.
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* @param {number} level The tile level;
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* @returns {Credit[]|undefined} The credits to be displayed when the tile is displayed.
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*/
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Azure2DImageryProvider.prototype.getTileCredits = function (x, y, level) {
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const hasAttributions = defined(this._attributionsByLevel);
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if (!hasAttributions || !defined(this._tileCredits)) {
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return undefined;
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}
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const innerCredits = this._attributionsByLevel.get(level);
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if (!defined(this._tileCredits)) {
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return innerCredits;
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}
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return this._tileCredits.concat(innerCredits);
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};
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/**
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* Requests the image for a given tile.
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*
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* @param {number} x The tile X coordinate.
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* @param {number} y The tile Y coordinate.
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* @param {number} level The tile level.
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* @param {Request} [request] The request object. Intended for internal use only.
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* @returns {Promise<ImageryTypes>|undefined} A promise for the image that will resolve when the image is available, or
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* undefined if there are too many active requests to the server, and the request should be retried later.
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*/
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Azure2DImageryProvider.prototype.requestImage = function (
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x,
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y,
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level,
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request,
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) {
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const promise = this._imageryProvider.requestImage(x, y, level, request);
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// If the requestImage call returns undefined, it couldn't be scheduled this frame. Make sure to return undefined so this can be handled upstream.
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if (!defined(promise)) {
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return undefined;
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}
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// Asynchronously request and populate _attributionsByLevel if it hasn't been already. We do this here so that the promise can be properly awaited.
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if (!defined(this._attributionsByLevel)) {
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return Promise.all([promise, this.getViewportCredits()]).then(
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(results) => results[0],
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);
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}
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return promise;
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};
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/**
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* Picking features is not currently supported by this imagery provider, so this function simply returns
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* undefined.
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*
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* @param {number} x The tile X coordinate.
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* @param {number} y The tile Y coordinate.
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* @param {number} level The tile level.
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* @param {number} longitude The longitude at which to pick features.
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* @param {number} latitude The latitude at which to pick features.
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* @return {undefined} Undefined since picking is not supported.
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*/
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Azure2DImageryProvider.prototype.pickFeatures = function (
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x,
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y,
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level,
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longitude,
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latitude,
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) {
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return undefined;
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};
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/**
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* Get attribution for imagery from Azure Maps to display in the credits
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* @private
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* @return {Promise<Map<Credit[]>>} The list of attribution sources to display in the credits.
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*/
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Azure2DImageryProvider.prototype.getViewportCredits = async function () {
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const maximumLevel = this._maximumLevel;
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const promises = [];
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for (let level = 0; level < maximumLevel + 1; level++) {
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promises.push(
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fetchViewportAttribution(
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this._resource,
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this._viewportUrl,
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this._subscriptionKey,
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this._tilesetId,
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level,
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),
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);
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}
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const results = await Promise.all(promises);
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const attributionsByLevel = new Map();
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for (let level = 0; level < maximumLevel + 1; level++) {
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const credits = [];
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const attributions = results[level].join(",");
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if (attributions) {
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const levelCredits = new Credit(attributions);
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credits.push(levelCredits);
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}
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attributionsByLevel.set(level, credits);
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}
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this._attributionsByLevel = attributionsByLevel;
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return attributionsByLevel;
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};
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async function fetchViewportAttribution(resource, url, key, tilesetId, level) {
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const viewportResource = resource.getDerivedResource({
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url,
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queryParameters: {
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zoom: level,
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bounds: "-180,-90,180,90",
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},
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data: JSON.stringify(Frozen.EMPTY_OBJECT),
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});
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const viewportJson = await viewportResource.fetchJson();
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return viewportJson.copyrights;
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}
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// Exposed for tests
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export default Azure2DImageryProvider;
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