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import defined from "../Core/defined.js";
import DeveloperError from "../Core/DeveloperError.js";
import GeographicTilingScheme from "../Core/GeographicTilingScheme.js";
import Resource from "../Core/Resource.js";
import WebMercatorProjection from "../Core/WebMercatorProjection.js";
import GetFeatureInfoFormat from "./GetFeatureInfoFormat.js";
import TimeDynamicImagery from "./TimeDynamicImagery.js";
import UrlTemplateImageryProvider from "./UrlTemplateImageryProvider.js";
/**
* EPSG codes known to include reverse axis orders, but are not within 4000-5000.
*
* @type {number[]}
*/
const includesReverseAxis = [
3034, // ETRS89-extended / LCC Europe
3035, // ETRS89-extended / LAEA Europe
3042, // ETRS89 / UTM zone 30N (N-E)
3043, // ETRS89 / UTM zone 31N (N-E)
3044, // ETRS89 / UTM zone 32N (N-E)
];
/**
* EPSG codes known to not include reverse axis orders, and are within 4000-5000.
*
* @type {number[]}
*/
const excludesReverseAxis = [
4471, // Mayotte
4559, // French Antilles
];
/**
* @typedef {object} WebMapServiceImageryProvider.ConstructorOptions
*
* Initialization options for the WebMapServiceImageryProvider constructor
*
* @property {Resource|string} url The URL of the WMS service. The URL supports the same keywords as the {@link UrlTemplateImageryProvider}.
* @property {string} layers The layers to include, separated by commas.
* @property {object} [parameters=WebMapServiceImageryProvider.DefaultParameters] Additional parameters to pass to the WMS server in the GetMap URL.
* @property {object} [getFeatureInfoParameters=WebMapServiceImageryProvider.GetFeatureInfoDefaultParameters] Additional parameters to pass to the WMS server in the GetFeatureInfo URL.
* @property {boolean} [enablePickFeatures=true] If true, {@link WebMapServiceImageryProvider#pickFeatures} will invoke
* the GetFeatureInfo operation on the WMS server and return the features included in the response. If false,
* {@link WebMapServiceImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable features)
* without communicating with the server. Set this property to false if you know your WMS server does not support
* GetFeatureInfo or if you don't want this provider's features to be pickable. Note that this can be dynamically
* overridden by modifying the WebMapServiceImageryProvider#enablePickFeatures property.
* @property {GetFeatureInfoFormat[]} [getFeatureInfoFormats=WebMapServiceImageryProvider.DefaultGetFeatureInfoFormats] The formats
* in which to try WMS GetFeatureInfo requests.
* @property {Rectangle} [rectangle=Rectangle.MAX_VALUE] The rectangle of the layer.
* @property {TilingScheme} [tilingScheme=new GeographicTilingScheme()] The tiling scheme to use to divide the world into tiles.
* @property {Ellipsoid} [ellipsoid] The ellipsoid. If the tilingScheme is specified,
* this parameter is ignored and the tiling scheme's ellipsoid is used instead. If neither
* parameter is specified, the WGS84 ellipsoid is used.
* @property {number} [tileWidth=256] The width of each tile in pixels.
* @property {number} [tileHeight=256] The height of each tile in pixels.
* @property {number} [minimumLevel=0] The minimum level-of-detail supported by the imagery provider. Take care when
* specifying this that the number of tiles at the minimum level is small, such as four or less. A larger number is
* likely to result in rendering problems.
* @property {number} [maximumLevel] The maximum level-of-detail supported by the imagery provider, or undefined if there is no limit.
* If not specified, there is no limit.
* @property {string} [crs] CRS specification, for use with WMS specification >= 1.3.0.
* @property {string} [srs] SRS specification, for use with WMS specification 1.1.0 or 1.1.1
* @property {Credit|string} [credit] A credit for the data source, which is displayed on the canvas.
* @property {string|string[]} [subdomains='abc'] The subdomains to use for the <code>{s}</code> placeholder in the URL template.
* If this parameter is a single string, each character in the string is a subdomain. If it is
* an array, each element in the array is a subdomain.
* @property {Clock} [clock] A Clock instance that is used when determining the value for the time dimension. Required when `times` is specified.
* @property {TimeIntervalCollection} [times] TimeIntervalCollection with its data property being an object containing time dynamic dimension and their values.
* @property {Resource|string} [getFeatureInfoUrl] The getFeatureInfo URL of the WMS service. If the property is not defined then we use the property value of url.
*/
/**
* Provides tiled imagery hosted by a Web Map Service (WMS) server.
*
* @alias WebMapServiceImageryProvider
* @constructor
*
* @param {WebMapServiceImageryProvider.ConstructorOptions} options Object describing initialization options
*
* @see ArcGisMapServerImageryProvider
* @see BingMapsImageryProvider
* @see GoogleEarthEnterpriseMapsProvider
* @see OpenStreetMapImageryProvider
* @see SingleTileImageryProvider
* @see TileMapServiceImageryProvider
* @see WebMapTileServiceImageryProvider
* @see UrlTemplateImageryProvider
*
* @see {@link https://enterprise.arcgis.com/en/server/latest/publish-services/linux/wms-services.htm|ArcGIS Server WMS Services}
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
*
* @example
* // WMS servers operated by the US government https://apps.nationalmap.gov/services/
* const provider = new Cesium.WebMapServiceImageryProvider({
* url : 'https://basemap.nationalmap.gov:443/arcgis/services/USGSHydroCached/MapServer/WMSServer',
* layers : '0',
* proxy: new Cesium.DefaultProxy('/proxy/')
* });
* const imageryLayer = new Cesium.ImageryLayer(provider);
* viewer.imageryLayers.add(imageryLayer);
*/
function WebMapServiceImageryProvider(options) {
options = options ?? Frozen.EMPTY_OBJECT;
//>>includeStart('debug', pragmas.debug);
if (!defined(options.url)) {
throw new DeveloperError("options.url is required.");
}
if (!defined(options.layers)) {
throw new DeveloperError("options.layers is required.");
}
//>>includeEnd('debug');
if (defined(options.times) && !defined(options.clock)) {
throw new DeveloperError(
"options.times was specified, so options.clock is required.",
);
}
this._defaultAlpha = undefined;
this._defaultNightAlpha = undefined;
this._defaultDayAlpha = undefined;
this._defaultBrightness = undefined;
this._defaultContrast = undefined;
this._defaultHue = undefined;
this._defaultSaturation = undefined;
this._defaultGamma = undefined;
this._defaultMinificationFilter = undefined;
this._defaultMagnificationFilter = undefined;
this._getFeatureInfoUrl = options.getFeatureInfoUrl ?? options.url;
const resource = Resource.createIfNeeded(options.url);
const pickFeatureResource = Resource.createIfNeeded(this._getFeatureInfoUrl);
resource.setQueryParameters(
WebMapServiceImageryProvider.DefaultParameters,
true,
);
pickFeatureResource.setQueryParameters(
WebMapServiceImageryProvider.GetFeatureInfoDefaultParameters,
true,
);
if (defined(options.parameters)) {
resource.setQueryParameters(objectToLowercase(options.parameters));
}
if (defined(options.getFeatureInfoParameters)) {
pickFeatureResource.setQueryParameters(
objectToLowercase(options.getFeatureInfoParameters),
);
}
const that = this;
this._reload = undefined;
if (defined(options.times)) {
this._timeDynamicImagery = new TimeDynamicImagery({
clock: options.clock,
times: options.times,
requestImageFunction: function (x, y, level, request, interval) {
return requestImage(that, x, y, level, request, interval);
},
reloadFunction: function () {
if (defined(that._reload)) {
that._reload();
}
},
});
}
const parameters = {};
parameters.layers = options.layers;
parameters.bbox =
"{westProjected},{southProjected},{eastProjected},{northProjected}";
parameters.width = "{width}";
parameters.height = "{height}";
// Use SRS or CRS based on the WMS version.
if (parseFloat(resource.queryParameters.version) >= 1.3) {
// Use CRS with 1.3.0 and going forward.
// For GeographicTilingScheme, use CRS:84 vice EPSG:4326 to specify lon, lat (x, y) ordering for
// bbox requests.
parameters.crs =
options.crs ??
(options.tilingScheme &&
options.tilingScheme.projection instanceof WebMercatorProjection
? "EPSG:3857"
: "CRS:84");
// The axis order in previous versions of the WMS specifications was to always use easting (x or lon ) and northing (y or
// lat). WMS 1.3.0 specifies that, depending on the particular CRS, the x axis may or may not be oriented West-to-East,
// and the y axis may or may not be oriented South-to-North. The WMS portrayal operation shall account for axis order.
// This affects some of the EPSG codes that were commonly used such as ESPG:4326. The current implementation
// makes sure that coordinates passed to the server (as part of the GetMap BBOX parameter) as well as those advertised
// in the capabilities document reflect the inverse axe orders for EPSG codes between 4000 and 5000.
// - Taken from Section 9.1.3 of https://download.osgeo.org/mapserver/docs/MapServer-56.pdf
const parts = parameters.crs.split(":");
if (parts[0] === "EPSG" && parts.length === 2) {
const code = Number(parts[1]);
if (
(code >= 4000 && code < 5000 && !excludesReverseAxis.includes(code)) ||
includesReverseAxis.includes(code)
) {
parameters.bbox =
"{southProjected},{westProjected},{northProjected},{eastProjected}";
}
}
} else {
// SRS for WMS 1.1.0 or 1.1.1.
parameters.srs =
options.srs ??
(options.tilingScheme &&
options.tilingScheme.projection instanceof WebMercatorProjection
? "EPSG:3857"
: "EPSG:4326");
}
resource.setQueryParameters(parameters, true);
pickFeatureResource.setQueryParameters(parameters, true);
const pickFeatureParams = {
query_layers: options.layers,
info_format: "{format}",
};
// use correct pixel coordinate identifier based on version
if (parseFloat(pickFeatureResource.queryParameters.version) >= 1.3) {
pickFeatureParams.i = "{i}";
pickFeatureParams.j = "{j}";
} else {
pickFeatureParams.x = "{i}";
pickFeatureParams.y = "{j}";
}
pickFeatureResource.setQueryParameters(pickFeatureParams, true);
this._resource = resource;
this._pickFeaturesResource = pickFeatureResource;
this._layers = options.layers;
// Let UrlTemplateImageryProvider do the actual URL building.
this._tileProvider = new UrlTemplateImageryProvider({
url: resource,
pickFeaturesUrl: pickFeatureResource,
tilingScheme:
options.tilingScheme ??
new GeographicTilingScheme({ ellipsoid: options.ellipsoid }),
rectangle: options.rectangle,
tileWidth: options.tileWidth,
tileHeight: options.tileHeight,
minimumLevel: options.minimumLevel,
maximumLevel: options.maximumLevel,
subdomains: options.subdomains,
tileDiscardPolicy: options.tileDiscardPolicy,
credit: options.credit,
getFeatureInfoFormats:
options.getFeatureInfoFormats ??
WebMapServiceImageryProvider.DefaultGetFeatureInfoFormats,
enablePickFeatures: options.enablePickFeatures,
});
}
function requestImage(imageryProvider, col, row, level, request, interval) {
const dynamicIntervalData = defined(interval) ? interval.data : undefined;
const tileProvider = imageryProvider._tileProvider;
if (defined(dynamicIntervalData)) {
// We set the query parameters within the tile provider, because it is managing the query.
tileProvider._resource.setQueryParameters(dynamicIntervalData);
}
return tileProvider.requestImage(col, row, level, request);
}
function pickFeatures(
imageryProvider,
x,
y,
level,
longitude,
latitude,
interval,
) {
const dynamicIntervalData = defined(interval) ? interval.data : undefined;
const tileProvider = imageryProvider._tileProvider;
Iif (defined(dynamicIntervalData)) {
// We set the query parameters within the tile provider, because it is managing the query.
tileProvider._pickFeaturesResource.setQueryParameters(dynamicIntervalData);
}
return tileProvider.pickFeatures(x, y, level, longitude, latitude);
}
Object.defineProperties(WebMapServiceImageryProvider.prototype, {
/**
* Gets the URL of the WMS server.
* @memberof WebMapServiceImageryProvider.prototype
* @type {string}
* @readonly
*/
url: {
get: function () {
return this._resource._url;
},
},
/**
* Gets the proxy used by this provider.
* @memberof WebMapServiceImageryProvider.prototype
* @type {Proxy}
* @readonly
*/
proxy: {
get: function () {
return this._resource.proxy;
},
},
/**
* Gets the names of the WMS layers, separated by commas.
* @memberof WebMapServiceImageryProvider.prototype
* @type {string}
* @readonly
*/
layers: {
get: function () {
return this._layers;
},
},
/**
* Gets the width of each tile, in pixels.
* @memberof WebMapServiceImageryProvider.prototype
* @type {number}
* @readonly
*/
tileWidth: {
get: function () {
return this._tileProvider.tileWidth;
},
},
/**
* Gets the height of each tile, in pixels.
* @memberof WebMapServiceImageryProvider.prototype
* @type {number}
* @readonly
*/
tileHeight: {
get: function () {
return this._tileProvider.tileHeight;
},
},
/**
* Gets the maximum level-of-detail that can be requested.
* @memberof WebMapServiceImageryProvider.prototype
* @type {number|undefined}
* @readonly
*/
maximumLevel: {
get: function () {
return this._tileProvider.maximumLevel;
},
},
/**
* Gets the minimum level-of-detail that can be requested.
* @memberof WebMapServiceImageryProvider.prototype
* @type {number}
* @readonly
*/
minimumLevel: {
get: function () {
return this._tileProvider.minimumLevel;
},
},
/**
* Gets the tiling scheme used by this provider.
* @memberof WebMapServiceImageryProvider.prototype
* @type {TilingScheme}
* @readonly
*/
tilingScheme: {
get: function () {
return this._tileProvider.tilingScheme;
},
},
/**
* Gets the rectangle, in radians, of the imagery provided by this instance.
* @memberof WebMapServiceImageryProvider.prototype
* @type {Rectangle}
* @readonly
*/
rectangle: {
get: function () {
return this._tileProvider.rectangle;
},
},
/**
* Gets the tile discard policy. If not undefined, the discard policy is responsible
* for filtering out "missing" tiles via its shouldDiscardImage function. If this function
* returns undefined, no tiles are filtered.
* @memberof WebMapServiceImageryProvider.prototype
* @type {TileDiscardPolicy}
* @readonly
*/
tileDiscardPolicy: {
get: function () {
return this._tileProvider.tileDiscardPolicy;
},
},
/**
* Gets an event that is raised when the imagery provider encounters an asynchronous error. By subscribing
* to the event, you will be notified of the error and can potentially recover from it. Event listeners
* are passed an instance of {@link TileProviderError}.
* @memberof WebMapServiceImageryProvider.prototype
* @type {Event}
* @readonly
*/
errorEvent: {
get: function () {
return this._tileProvider.errorEvent;
},
},
/**
* Gets the credit to display when this imagery provider is active. Typically this is used to credit
* the source of the imagery.
* @memberof WebMapServiceImageryProvider.prototype
* @type {Credit}
* @readonly
*/
credit: {
get: function () {
return this._tileProvider.credit;
},
},
/**
* Gets a value indicating whether or not the images provided by this imagery provider
* include an alpha channel. If this property is false, an alpha channel, if present, will
* be ignored. If this property is true, any images without an alpha channel will be treated
* as if their alpha is 1.0 everywhere. When this property is false, memory usage
* and texture upload time are reduced.
* @memberof WebMapServiceImageryProvider.prototype
* @type {boolean}
* @readonly
*/
hasAlphaChannel: {
get: function () {
return this._tileProvider.hasAlphaChannel;
},
},
/**
* Gets or sets a value indicating whether feature picking is enabled. If true, {@link WebMapServiceImageryProvider#pickFeatures} will
* invoke the <code>GetFeatureInfo</code> service on the WMS server and attempt to interpret the features included in the response. If false,
* {@link WebMapServiceImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable
* features) without communicating with the server. Set this property to false if you know your data
* source does not support picking features or if you don't want this provider's features to be pickable.
* @memberof WebMapServiceImageryProvider.prototype
* @type {boolean}
* @default true
*/
enablePickFeatures: {
get: function () {
return this._tileProvider.enablePickFeatures;
},
set: function (enablePickFeatures) {
this._tileProvider.enablePickFeatures = enablePickFeatures;
},
},
/**
* Gets or sets a clock that is used to get keep the time used for time dynamic parameters.
* @memberof WebMapServiceImageryProvider.prototype
* @type {Clock}
*/
clock: {
get: function () {
return this._timeDynamicImagery.clock;
},
set: function (value) {
this._timeDynamicImagery.clock = value;
},
},
/**
* Gets or sets a time interval collection that is used to get time dynamic parameters. The data of each
* TimeInterval is an object containing the keys and values of the properties that are used during
* tile requests.
* @memberof WebMapServiceImageryProvider.prototype
* @type {TimeIntervalCollection}
*/
times: {
get: function () {
return this._timeDynamicImagery.times;
},
set: function (value) {
this._timeDynamicImagery.times = value;
},
},
/**
* Gets the getFeatureInfo URL of the WMS server.
* @memberof WebMapServiceImageryProvider.prototype
* @type {Resource|string}
* @readonly
*/
getFeatureInfoUrl: {
get: function () {
return this._getFeatureInfoUrl;
},
},
});
/**
* Gets the credits to be displayed when a given tile is displayed.
*
* @param {number} x The tile X coordinate.
* @param {number} y The tile Y coordinate.
* @param {number} level The tile level;
* @returns {Credit[]} The credits to be displayed when the tile is displayed.
*/
WebMapServiceImageryProvider.prototype.getTileCredits = function (x, y, level) {
return this._tileProvider.getTileCredits(x, y, level);
};
/**
* Requests the image for a given tile.
*
* @param {number} x The tile X coordinate.
* @param {number} y The tile Y coordinate.
* @param {number} level The tile level.
* @param {Request} [request] The request object. Intended for internal use only.
* @returns {Promise<ImageryTypes>|undefined} A promise for the image that will resolve when the image is available, or
* undefined if there are too many active requests to the server, and the request should be retried later.
*/
WebMapServiceImageryProvider.prototype.requestImage = function (
x,
y,
level,
request,
) {
let result;
const timeDynamicImagery = this._timeDynamicImagery;
let currentInterval;
// Try and load from cache
if (defined(timeDynamicImagery)) {
currentInterval = timeDynamicImagery.currentInterval;
result = timeDynamicImagery.getFromCache(x, y, level, request);
}
// Couldn't load from cache
if (!defined(result)) {
result = requestImage(this, x, y, level, request, currentInterval);
}
// If we are approaching an interval, preload this tile in the next interval
if (defined(result) && defined(timeDynamicImagery)) {
timeDynamicImagery.checkApproachingInterval(x, y, level, request);
}
return result;
};
/**
* Asynchronously determines what features, if any, are located at a given longitude and latitude within
* a tile.
*
* @param {number} x The tile X coordinate.
* @param {number} y The tile Y coordinate.
* @param {number} level The tile level.
* @param {number} longitude The longitude at which to pick features.
* @param {number} latitude The latitude at which to pick features.
* @return {Promise<ImageryLayerFeatureInfo[]>|undefined} A promise for the picked features that will resolve when the asynchronous
* picking completes. The resolved value is an array of {@link ImageryLayerFeatureInfo}
* instances. The array may be empty if no features are found at the given location.
*/
WebMapServiceImageryProvider.prototype.pickFeatures = function (
x,
y,
level,
longitude,
latitude,
) {
const timeDynamicImagery = this._timeDynamicImagery;
const currentInterval = defined(timeDynamicImagery)
? timeDynamicImagery.currentInterval
: undefined;
return pickFeatures(this, x, y, level, longitude, latitude, currentInterval);
};
/**
* The default parameters to include in the WMS URL to obtain images. The values are as follows:
* service=WMS
* version=1.1.1
* request=GetMap
* styles=
* format=image/jpeg
*
* @constant
* @type {object}
*/
WebMapServiceImageryProvider.DefaultParameters = Object.freeze({
service: "WMS",
version: "1.1.1",
request: "GetMap",
styles: "",
format: "image/jpeg",
});
/**
* The default parameters to include in the WMS URL to get feature information. The values are as follows:
* service=WMS
* version=1.1.1
* request=GetFeatureInfo
*
* @constant
* @type {object}
*/
WebMapServiceImageryProvider.GetFeatureInfoDefaultParameters = Object.freeze({
service: "WMS",
version: "1.1.1",
request: "GetFeatureInfo",
});
WebMapServiceImageryProvider.DefaultGetFeatureInfoFormats = Object.freeze([
Object.freeze(new GetFeatureInfoFormat("json", "application/json")),
Object.freeze(new GetFeatureInfoFormat("xml", "text/xml")),
Object.freeze(new GetFeatureInfoFormat("text", "text/html")),
]);
function objectToLowercase(obj) {
const result = {};
for (const key in obj) {
Eif (obj.hasOwnProperty(key)) {
result[key.toLowerCase()] = obj[key];
}
}
return result;
}
export default WebMapServiceImageryProvider;
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