671 lines
56 KiB
HTML
671 lines
56 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>GeographicProjection - Cesium Documentation</title>
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<!--[if lt IE 9]>
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<script src="javascript/html5.js"></script>
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<![endif]-->
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<link href="styles/jsdoc-default.css" rel="stylesheet">
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<link href="styles/prism.css" rel="stylesheet">
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</head>
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<body>
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<div id="main">
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<h1 class="page-title">
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<a href="index.html"><img src="Images/CesiumLogo.png" class="cesiumLogo"></a>
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GeographicProjection
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<div class="titleCenterer"></div>
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</h1>
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<section>
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<header>
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</header>
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<article>
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<div class="container-overview">
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<div class="nameContainer">
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<h4 class="name" id="GeographicProjection">
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<a href="#GeographicProjection" class="doc-link"></a>
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new Cesium.GeographicProjection<span class="signature">(<span class="optional">ellipsoid</span>)</span>
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<div class="source-link rightLinks">
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<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/GeographicProjection.js#L21">Core/GeographicProjection.js 21</a>
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</div>
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</h4>
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</div>
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<div class="description">
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A simple map projection where longitude and latitude are linearly mapped to X and Y by multiplying
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them by the <a href="Ellipsoid.html#maximumRadius"><code>Ellipsoid#maximumRadius</code></a>. This projection
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is commonly known as geographic, equirectangular, equidistant cylindrical, or plate carrée. It
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is also known as EPSG:4326.
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</div>
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<table class="params">
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<thead>
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<tr>
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<th>Name</th>
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<th>Type</th>
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<th>Default</th>
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<th class="last">Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td class="name"><code>ellipsoid</code></td>
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<td class="type">
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<span class="param-type"><a href="Ellipsoid.html">Ellipsoid</a></span>
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</td>
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<td class="default">
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<code class="language-javascript">Ellipsoid.WGS84</code>
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</td>
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<td class="description last">
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<span class="optional">optional</span>
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The ellipsoid.</td>
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</tr>
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</tbody>
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</table>
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<dl class="details">
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<h5>See:</h5>
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<ul class="see-list">
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<li><a href="WebMercatorProjection.html">WebMercatorProjection</a></li>
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</ul>
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</dl>
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</div>
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<h3 class="subsection-title">Members</h3>
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<div class="nameContainer">
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<h4 class="name" id="ellipsoid">
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<a href="#ellipsoid" class="doc-link"></a>
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<span class="type-signature attribute-readonly">readonly</span> ellipsoid<span class="type-signature"> : <a href="Ellipsoid.html">Ellipsoid</a></span>
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<div class="source-link rightLinks">
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<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/GeographicProjection.js#L36">Core/GeographicProjection.js 36</a>
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</div>
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</h4>
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</div>
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<div class="description">
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Gets the <a href="Ellipsoid.html"><code>Ellipsoid</code></a>.
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</div>
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<dl class="details">
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</dl>
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<h3 class="subsection-title">Methods</h3>
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<div class="nameContainer">
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<h4 class="name" id="project">
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<a href="#project" class="doc-link"></a>
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project<span class="signature">(cartographic, <span class="optional">result</span>)</span> → <span class="type-signature returnType"><a href="Cartesian3.html">Cartesian3</a></span>
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<div class="source-link rightLinks">
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<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/GeographicProjection.js#L55">Core/GeographicProjection.js 55</a>
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</div>
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</h4>
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</div>
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<div class="description">
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Projects a set of <a href="Cartographic.html"><code>Cartographic</code></a> coordinates, in radians, to map coordinates, in meters.
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X and Y are the longitude and latitude, respectively, multiplied by the maximum radius of the
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ellipsoid. Z is the unmodified height.
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</div>
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<table class="params">
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<thead>
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<tr>
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<th>Name</th>
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<th>Type</th>
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<th class="last">Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td class="name"><code>cartographic</code></td>
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<td class="type">
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<span class="param-type"><a href="Cartographic.html">Cartographic</a></span>
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</td>
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<td class="description last">
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The coordinates to project.</td>
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</tr>
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<tr>
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<td class="name"><code>result</code></td>
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<td class="type">
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<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
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</td>
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<td class="description last">
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<span class="optional">optional</span>
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An instance into which to copy the result. If this parameter is
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undefined, a new instance is created and returned.</td>
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</tr>
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</tbody>
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</table>
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<h5>Returns:</h5>
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<div class="param-desc">
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The projected coordinates. If the result parameter is not undefined, the
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coordinates are copied there and that instance is returned. Otherwise, a new instance is
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created and returned.
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</div>
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<dl class="details">
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</dl>
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<div class="nameContainer">
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<h4 class="name" id="unproject">
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<a href="#unproject" class="doc-link"></a>
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unproject<span class="signature">(cartesian, <span class="optional">result</span>)</span> → <span class="type-signature returnType"><a href="Cartographic.html">Cartographic</a></span>
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<div class="source-link rightLinks">
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<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/GeographicProjection.js#L84">Core/GeographicProjection.js 84</a>
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</div>
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</h4>
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</div>
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<div class="description">
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Unprojects a set of projected <a href="Cartesian3.html"><code>Cartesian3</code></a> coordinates, in meters, to <a href="Cartographic.html"><code>Cartographic</code></a>
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coordinates, in radians. Longitude and Latitude are the X and Y coordinates, respectively,
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divided by the maximum radius of the ellipsoid. Height is the unmodified Z coordinate.
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</div>
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<table class="params">
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<thead>
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<tr>
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<th>Name</th>
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<th>Type</th>
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<th class="last">Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td class="name"><code>cartesian</code></td>
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<td class="type">
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<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
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</td>
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<td class="description last">
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The Cartesian position to unproject with height (z) in meters.</td>
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</tr>
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<tr>
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<td class="name"><code>result</code></td>
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<td class="type">
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<span class="param-type"><a href="Cartographic.html">Cartographic</a></span>
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</td>
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<td class="description last">
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<span class="optional">optional</span>
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An instance into which to copy the result. If this parameter is
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undefined, a new instance is created and returned.</td>
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</tr>
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</tbody>
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</table>
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<h5>Returns:</h5>
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<div class="param-desc">
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The unprojected coordinates. If the result parameter is not undefined, the
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coordinates are copied there and that instance is returned. Otherwise, a new instance is
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created and returned.
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</div>
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<dl class="details">
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</dl>
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</article>
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</section>
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<footer>
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.6.10</a>
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</footer>
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</div>
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<div class="nav">
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