Source: globe/EarthRestElevationCoverage.js

/*
 * Copyright 2003-2006, 2009, 2017, United States Government, as represented by the Administrator of the
 * National Aeronautics and Space Administration. All rights reserved.
 *
 * The NASAWorldWind/WebWorldWind platform is licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * @exports EarthRestElevationCoverage
 */
define([
        '../util/LevelSet',
        '../geom/Location',
        '../geom/Sector',
        '../util/LevelRowColumnUrlBuilder',
        '../globe/TiledElevationCoverage'
    ],
    function (LevelSet,
              Location,
              Sector,
              LevelRowColumnUrlBuilder,
              TiledElevationCoverage) {
        "use strict";

        /**
         * Constructs an elevation coverage for Earth using a REST interface to retrieve the elevations from the server.
         * @alias EarthRestElevationCoverage
         * @constructor
         * @classdesc Represents an Earth elevation coverage spanning the globe and using a REST interface to retrieve
         * the elevations from the server.
         * See [LevelRowColumnUrlBuilder]{@link LevelRowColumnUrlBuilder} for a description of the REST interface.
         * @param {String} serverAddress The server address of the tile service. May be null, in which case the
         * current origin is used (see <code>window.location</code>.
         * @param {String} pathToData The path to the data directory relative to the specified server address.
         * May be null, in which case the server address is assumed to be the full path to the data directory.
         * @param {String} displayName The display name to associate with this elevation coverage.
         */
        var EarthRestElevationCoverage = function (serverAddress, pathToData, displayName) {
            TiledElevationCoverage.call(this, {
                coverageSector: Sector.FULL_SPHERE,
                resolution: 0.00732421875,
                retrievalImageFormat: "application/bil16",
                minElevation: -11000,
                maxElevation: 8850,
                urlBuilder: new LevelRowColumnUrlBuilder(serverAddress, pathToData)
            });

            this.displayName = displayName || "Earth Elevations";

            // Override the default computed LevelSet. EarthRestElevationCoverage accesses a fixed set of tiles with
            // a 60x60 top level tile delta, 5 levels, and tile dimensions of 512x512 pixels.
            this.levels = new LevelSet(Sector.FULL_SPHERE, new Location(60, 60), 5, 512, 512);
        };

        EarthRestElevationCoverage.prototype = Object.create(TiledElevationCoverage.prototype);

        return EarthRestElevationCoverage;
    });