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106 lines
8.0 KiB
HTML
106 lines
8.0 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 name='viewport' content='width=device-width, initial-scale=1.0'>
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<title>OpenLayers - Background</title>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.28.0/components/prism-core.min.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.28.0/plugins/autoloader/prism-autoloader.min.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.28.0/plugins/toolbar/prism-toolbar.min.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.28.0/plugins/copy-to-clipboard/prism-copy-to-clipboard.min.js"></script>
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<link rel="stylesheet" type="text/css" href="https://fonts.googleapis.com/css?family=Quattrocento+Sans:400,400italic,700" crossorigin="anonymous">
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<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/css/bootstrap.min.css" crossorigin="anonymous">
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<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.1.2/css/fontawesome.min.css" crossorigin="anonymous">
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<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.1.2/css/solid.css" crossorigin="anonymous">
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<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.1.2/css/brands.css" crossorigin="anonymous">
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<link rel="stylesheet" type="text/css" href="/theme/ol.css">
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<link rel="stylesheet" type="text/css" href="/theme/site.css">
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<link rel="icon" type="image/svg+xml" href="/theme/img/logo-light.svg" media="(prefers-color-scheme: light)" />
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<link rel="icon" type="image/svg+xml" href="/theme/img/logo-dark.svg" media="(prefers-color-scheme: dark)" />
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</head>
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<body>
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<header class="navbar navbar-expand-md navbar-dark mb-3 px-3 py-0 fixed-top" role="navigation">
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<a class="navbar-brand" href="/"><img src="/theme/img/logo-dark.svg" width="70" height="70" alt=""> OpenLayers</a>
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<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#olmenu" aria-controls="olmenu" aria-expanded="false" aria-label="Toggle navigation">
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<span class="navbar-toggler-icon"></span>
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</button>
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<!-- menu items that get hidden below 768px width -->
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<nav class="collapse navbar-collapse" id="olmenu">
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<ul class="nav navbar-nav ms-auto">
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<li class="nav-item dropdown">
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<a class="nav-link dropdown-toggle" href="#" id="docdropdown" role="button" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Docs</a>
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<div class="dropdown-menu dropdown-menu-end mb-3" aria-labelledby="docdropdown">
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<a class="dropdown-item" href="/doc/">Docs</a>
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<div class="dropdown-divider"></div>
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<a class="dropdown-item" href="/doc/quickstart.html"><i class="fa fa-check fa-fw me-2 fa-lg"></i>Quick Start</a>
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<a class="dropdown-item" href="/doc/faq.html"><i class="fa fa-question fa-fw me-2 fa-lg"></i>FAQ</a>
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<a class="dropdown-item" href="/doc/tutorials/"><i class="fa fa-book fa-fw me-2 fa-lg"></i>Tutorials</a>
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<a class="dropdown-item" href="/workshop/"><i class="fa fa-graduation-cap fa-fw me-2 fa-lg"></i>Workshop</a>
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<div class="dropdown-divider"></div>
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<a class="dropdown-item" href="https://stackoverflow.com/questions/tagged/openlayers"><i class="fab fa-stack-overflow fa-fw me-2"></i>Ask a Question</a>
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</div>
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</li>
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<li class="nav-item"><a class="nav-link" href="/en/latest/examples/">Examples</a></li>
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<li class="nav-item dropdown">
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<a class="nav-link dropdown-toggle" href="#" id="apidropdown" role="button" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
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<i class="fa fa-sitemap me-1"></i>API
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</a>
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<div class="dropdown-menu dropdown-menu-end mb-3" aria-labelledby="apidropdown">
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<a class="dropdown-item" href="/en/latest/apidoc/"><i class="fa fa-sitemap fa-fw me-2 fa-lg"></i>v9.1.0 (latest)</a>
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<a class="dropdown-item" href="/en/v8.1.0/apidoc/"><i class="fa fa-sitemap a-fw me-2 fa-lg"></i>v8.1.0</a>
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<a class="dropdown-item" href="/en/v7.5.2/apidoc/"><i class="fa fa-sitemap a-fw me-2 fa-lg"></i>v7.5.2</a>
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<a class="dropdown-item" href="/en/v6.15.1/apidoc/"><i class="fa fa-sitemap a-fw me-2 fa-lg"></i>v6.15.1</a>
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<a class="dropdown-item" href="/en/v5.3.0/apidoc/"><i class="fa fa-sitemap fa-fw me-2 fa-lg"></i>v5.3.0</a>
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<a class="dropdown-item" href="/en/v4.6.5/apidoc/"><i class="fa fa-sitemap fa-fw me-2 fa-lg"></i>v4.6.5</a>
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<a class="dropdown-item" href="/en/v3.20.1/apidoc/"><i class="fa fa-sitemap fa-fw me-2 fa-lg"></i>v3.20.1</a>
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</div>
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</li>
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<li class="nav-item dropdown">
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<a class="nav-link dropdown-toggle" href="#" id="codedropdown" role="button" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Code</a>
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<div class="dropdown-menu dropdown-menu-end mb-3" aria-labelledby="codedropdown">
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<a class="dropdown-item" href="https://github.com/openlayers/openlayers"><i class="fab fa-github fa-fw me-2 fa-lg"></i>Repository</a>
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<a class="dropdown-item" href="/download/"><i class="fa fa-download fa-fw me-2 fa-lg"></i>Download</a>
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</div>
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</li>
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</ul>
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</nav>
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</header>
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<div class="container">
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<h1 id="background">Background</h1>
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<h2 id="overview">Overview</h2>
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<p>OpenLayers is a modular, high-performance, feature-packed library for displaying and interacting with maps and geospatial data.</p>
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<p>The library comes with built-in support for a wide range of commercial and free image and vector tile sources, and the most popular open and proprietary vector data formats. With OpenLayers's map projection support, data can be in any projection.</p>
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<h2 id="public-api">Public API</h2>
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<p>OpenLayers is available as <a href="https://npmjs.com/package/ol"><code>ol</code> npm package</a>, which provides all modules of the officially supported <a href="../../apidoc">API</a>.</p>
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<h2 id="browser-support">Browser Support</h2>
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<p>OpenLayers runs on all modern browsers (with greater than 1% global usage). This includes Chrome, Firefox, Safari and Edge. For older browsers, <a href="https://polyfill.io/">polyfills</a> will likely need to be added.</p>
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<p>The library is intended for use on both desktop/laptop and mobile devices, and supports pointer and touch interactions.</p>
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<h2 id="module-and-naming-conventions">Module and Naming Conventions</h2>
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<p>OpenLayers modules with CamelCase names provide classes as default exports, and may contain additional constants or functions as named exports:</p>
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<pre><code class="language-js">import Map from 'ol/Map.js';
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import View from 'ol/View.js';
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</code></pre>
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<p>Class hierarchies grouped by their parent are provided in a subfolder of the package, e.g. <code>layer/</code>.</p>
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<p>For convenience, these are also available as named exports, e.g.</p>
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<pre><code class="language-js">import {Map, View} from 'ol';
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import {Tile, Vector} from 'ol/layer.js';
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</code></pre>
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<p>In addition to these re-exported classes, modules with lowercase names also provide constants or functions as named exports:</p>
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<pre><code class="language-js">import {getUid} from 'ol';
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import {fromLonLat} from 'ol/proj.js';
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</code></pre>
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</div>
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<footer>
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Code licensed under the <a href='http://www.tldrlegal.com/license/bsd-2-clause-license-(freebsd)'>2-Clause BSD</a>.
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All documentation <a href='http://creativecommons.org/licenses/by/3.0/'>CC BY 3.0</a>.
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Thanks to our <a href='https://opencollective.com/openlayers'>sponsors</a>.
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<br>
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<a href="https://www.netlify.com">This site is powered by Netlify.</a>
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</footer>
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/js/bootstrap.bundle.min.js"></script>
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</body>
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</html>
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