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330 lines
15 KiB
HTML
330 lines
15 KiB
HTML
2 weeks ago
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<!DOCTYPE html>
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<html lang="en-US">
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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="initial-scale=1.0, user-scalable=no, width=device-width">
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<script>
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var gaProperty = 'UA-2577926-1';
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// Disable tracking if the opt-out cookie exists.
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var disableStr = 'ga-disable-' + gaProperty;
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if (document.cookie.indexOf(disableStr + '=true') > -1) {
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window[disableStr] = true;
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document.cookie = disableStr + '=true; expires=Thu, 31 Dec 2099 23:59:59 UTC; path=/';
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function gaOptoutRevoke() {
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document.cookie = disableStr + '=false; expires=Thu, 31 Dec 2099 23:59:59 UTC; path=/';
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window[disableStr] = false;
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}
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</script>
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<script async src="https://www.googletagmanager.com/gtag/js?id=UA-2577926-1"></script>
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<script>
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window.dataLayer = window.dataLayer || [];
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function gtag(){dataLayer.push(arguments);}
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gtag('js', new Date());
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gtag('config', 'UA-2577926-1', { 'anonymize_ip': true });
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</script>
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<link rel="stylesheet" type="text/css" href="//cdnjs.cloudflare.com/ajax/libs/cookieconsent2/3.1.0/cookieconsent.min.css" />
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<script src="//cdnjs.cloudflare.com/ajax/libs/cookieconsent2/3.1.0/cookieconsent.min.js"></script>
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<script src="https://unpkg.com/lz-string@1.4.4/libs/lz-string.min.js"></script>
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<script>
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window.addEventListener("load", function() {
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window.cookieconsent.initialise({
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'palette': {
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'popup': {
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'background': '#eaf7f7',
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'text': '#5c7291'
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},
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'button': {
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'background': '#56cbdb',
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'text': '#ffffff'
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}
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},
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'theme': 'edgeless',
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'type': 'opt-out',
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'onInitialise': function (status) {
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if (!this.hasConsented()) {
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gaOptout()
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}
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},
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'onStatusChange': function(status, chosenBefore) {
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if (!this.hasConsented()) {
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gaOptout()
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}
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},
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'onRevokeChoice': function() {
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gaOptoutRevoke()
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}
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})
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});
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</script>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" type="text/css">
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" type="text/css">
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<link rel="stylesheet" href="./resources/prism/prism-1.20.0.css" type="text/css">
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<link rel="stylesheet" href="./css/ol.css" type="text/css">
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<link rel="stylesheet" href="./resources/layout.css" type="text/css">
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<script src="https://unpkg.com/elm-pep"></script>
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<script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=fetch,requestAnimationFrame,Element.prototype.classList,TextDecoder"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/3.18.3/minified.js"></script>
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<title>Layer Zoom Limits</title>
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</head>
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<body>
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<header class="navbar navbar-expand-sm navbar-dark mb-3 py-0" role="navigation">
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<a class="navbar-brand" href="https://openlayers.org/"><img src="./resources/logo-70x70.png" alt=""> OpenLayers</a>
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<button class="navbar-toggler" type="button" data-toggle="collapse" data-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 ml-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-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Docs</a>
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<div class="dropdown-menu dropdown-menu-right 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 mr-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 mr-2 fa-lg"></i>FAQ</a>
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<a class="dropdown-item" href="../doc/tutorials/"><i class="fa fa-book fa-fw mr-2 fa-lg"></i>Tutorials</a>
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<a class="dropdown-item" href="/workshop/"><i class="fa fa-graduation-cap fa-fw mr-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="fa fa-stack-overflow fa-fw mr-2"></i>Ask a Question</a>
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</div>
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</li>
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<li class="nav-item active"><a class="nav-link" href="../examples/">Examples</a></li>
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<li class="nav-item"><a class="nav-link" href="../apidoc/"><i class="fa fa-sitemap mr-1"></i>API</a></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-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Code</a>
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<div class="dropdown-menu dropdown-menu-right mb-3" aria-labelledby="codedropdown">
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<a class="dropdown-item" href="https://github.com/openlayers/openlayers"><i class="fa fa-github fa-fw mr-2 fa-lg"></i>Repository</a>
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<a class="dropdown-item" href="/download/"><i class="fa fa-download fa-fw mr-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-fluid line-numbers">
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<div id="latest-check" class="alert alert-warning alert-dismissible" role="alert" style="display:none">
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<button id="latest-dismiss" type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">×</span></button>
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This example uses OpenLayers v<span>6.12.0</span>. The <a id="latest-link" href="#" class="alert-link">latest</a> is v<span id="latest-version"></span>.
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</div>
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<div class="row-fluid">
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<a href="#" id="codepen-button" class="btn btn-link float-right">
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<i class="fa fa-codepen fa-lg"></i> Edit
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</a>
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<div class="span12">
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<h4 id="title">Layer Zoom Limits</h4>
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<p class="tags">
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<span class="badge-group">
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<a
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href="./index.html?q=minZoom" class="badge badge-info">minZoom</a
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><a
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class="badge badge-info tag-modal-toggle text-white"
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data-toggle="modal"
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data-target="#tag-example-list"
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data-title="minZoom"
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data-content="
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<a class="list-group-item list-group-item-action" href="./zoom-constrained.html">Constrained Zoom</a>
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<a class="list-group-item list-group-item-action active" href="./layer-zoom-limits.html">Layer Zoom Limits</a>"
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tabindex="0"
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>2</a>
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</span>
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<span class="badge-group">
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<a
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href="./index.html?q=maxZoom" class="badge badge-info">maxZoom</a
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><a
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class="badge badge-info tag-modal-toggle text-white"
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data-toggle="modal"
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data-target="#tag-example-list"
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data-title="maxZoom"
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data-content="
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<a class="list-group-item list-group-item-action" href="./zoom-constrained.html">Constrained Zoom</a>
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<a class="list-group-item list-group-item-action active" href="./layer-zoom-limits.html">Layer Zoom Limits</a>"
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tabindex="0"
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>2</a>
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</span>
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<span class="badge-group">
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<a
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href="./index.html?q=layer" class="badge badge-info">layer</a
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><a
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class="badge badge-info tag-modal-toggle text-white"
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data-toggle="modal"
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data-target="#tag-example-list"
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data-title="layer"
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data-content="
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<a class="list-group-item list-group-item-action" href="./layer-z-index.html">Layer Z-Index</a>
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<a class="list-group-item list-group-item-action active" href="./layer-zoom-limits.html">Layer Zoom Limits</a>
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<a class="list-group-item list-group-item-action" href="./svg-layer.html">SVG Layer</a>
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<a class="list-group-item list-group-item-action" href="./webgl-points-layer.html">WebGL points layer</a>"
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tabindex="0"
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>4</a>
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</span>
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</p>
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<div class="modal modal-tag-example" id="tag-example-list" tabindex="-1" role="dialog" aria-labelledby="tag-example-title" aria-hidden="true">
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<div class="modal-dialog modal-dialog-scrollable" role="document">
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<div class="modal-content">
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<div class="modal-header">
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<h5 class="modal-title" id="tag-example-title"></h5>
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<button type="button" class="close" data-dismiss="modal" aria-label="Close">
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<span aria-hidden="true">×</span>
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</button>
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</div>
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<div class="modal-body">
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<div class="list-group"></div>
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</div>
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</div>
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</div>
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</div>
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<div id="map" class="map"></div>
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</div>
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<form method="POST" id="codepen-form" target="_blank" action="https://codesandbox.io/api/v1/sandboxes/define">
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<input id="codesandbox-params" type="hidden" name="parameters">
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</form>
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</div>
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<div class="row-fluid">
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<div class="span12">
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<p id="shortdesc">Using minZoom and maxZoom to control layer visibility.</p>
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<div id="docs"><p>Layers support <code>minZoom</code> and <code>maxZoom</code> options for controlling visibility based on the view's zoom level. If min or max zoom are set, the layer will only be visible at zoom levels greater than the <code>minZoom</code> and less than or equal to the <code>maxZoom</code>. After construction, the layer's <code>setMinZoom</code> and <code>setMaxZoom</code> can be used to set limits. This example shows an OSM layer at zoom levels 14 and lower and a USGS layer at zoom levels higher than 14.</p>
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</div>
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</div>
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</div>
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<div class="row-fluid">
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<h5 class="source-heading">main.js</h5>
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<pre><code id="example-js-source" class="language-js">import 'ol/ol.css';
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import Map from 'ol/Map';
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import OSM from 'ol/source/OSM';
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import TileJSON from 'ol/source/TileJSON';
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import TileLayer from 'ol/layer/Tile';
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import View from 'ol/View';
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import {fromLonLat} from 'ol/proj';
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const key = 'Get your own API key at https://www.maptiler.com/cloud/';
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const map = new Map({
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target: 'map',
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layers: [
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new TileLayer({
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maxZoom: 14, // visible at zoom levels 14 and below
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source: new OSM(),
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}),
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new TileLayer({
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minZoom: 14, // visible at zoom levels above 14
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source: new TileJSON({
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url: 'https://api.maptiler.com/maps/outdoor/tiles.json?key=' + key,
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tileSize: 512,
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}),
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}),
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],
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view: new View({
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center: fromLonLat([-112.18688965, 36.057944835]),
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zoom: 15,
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maxZoom: 18,
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constrainOnlyCenter: true,
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}),
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});
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</code></pre>
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</div>
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<div class="row-fluid">
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<h5 class="source-heading">index.html</h5>
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<pre><code id="example-html-source" class="language-markup"><!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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<title>Layer Zoom Limits</title>
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<!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
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<script src="https://unpkg.com/elm-pep"></script>
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<!-- The lines below are only needed for old environments like Internet Explorer and Android 4.x -->
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<script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=fetch,requestAnimationFrame,Element.prototype.classList,TextDecoder"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/3.18.3/minified.js"></script>
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<style>
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.map {
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width: 100%;
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height:400px;
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}
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</style>
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</head>
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<body>
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<div id="map" class="map"></div>
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<script src="main.js"></script>
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</body>
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</html></code></pre>
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</div>
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<div class="row-fluid">
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<h5 class="source-heading">package.json</h5>
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<pre><code id="example-pkg-source" class="language-json">{
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"name": "layer-zoom-limits",
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"dependencies": {
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"ol": "6.12.0"
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},
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"devDependencies": {
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"parcel": "^2.0.0"
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},
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"scripts": {
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"start": "parcel index.html",
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"build": "parcel build --public-url . index.html"
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}
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}</code></pre>
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</div>
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</div>
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<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
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||
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.bundle.min.js"></script>
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<script src="./resources/prism/prism-1.20.0.min.js"></script>
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<script src="./resources/common.js"></script>
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<script src="common.js"></script>
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<script src="layer-zoom-limits.js"></script>
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<script>
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$('#tag-example-list').on('show.bs.modal', function (event) {
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const button = $(event.relatedTarget); // Button that triggered the modal
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const title = button.data('title');
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const content = button.data('content');
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const modal = $(this)
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modal.find('.modal-title').text(title);
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modal.find('.modal-body').html(content);
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});
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var packageUrl = 'https://raw.githubusercontent.com/openlayers/openlayers.github.io/build/package.json';
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fetch(packageUrl).then(function(response) {
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return response.json();
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}).then(function(json) {
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var latestVersion = json.version;
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document.getElementById('latest-version').innerHTML = latestVersion;
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||
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|
var url = window.location.href;
|
||
|
|
var branchSearch = url.match(/\/([^\/]*)\/examples\//);
|
||
|
|
var cookieText = 'dismissed=-' + latestVersion + '-';
|
||
|
|
var dismissed = document.cookie.indexOf(cookieText) != -1;
|
||
|
|
if (branchSearch && !dismissed && /^v[0-9\.]*$/.test(branchSearch[1]) && '6.12.0' != latestVersion) {
|
||
|
|
var link = url.replace(branchSearch[0], '/latest/examples/');
|
||
|
|
fetch(link, {method: 'head'}).then(function(response) {
|
||
|
|
var a = document.getElementById('latest-link');
|
||
|
|
a.href = response.status == 200 ? link : '../../latest/examples/';
|
||
|
|
});
|
||
|
|
var latestCheck = document.getElementById('latest-check');
|
||
|
|
latestCheck.style.display = '';
|
||
|
|
document.getElementById('latest-dismiss').onclick = function() {
|
||
|
|
latestCheck.style.display = 'none';
|
||
|
|
document.cookie = cookieText;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
</script>
|
||
|
|
</body>
|
||
|
|
</html>
|