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450 lines
22 KiB
HTML
450 lines
22 KiB
HTML
<!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 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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gaOptout()
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gaOptout()
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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>Change Tile Layer Style</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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<a class="dropdown-item" href="../doc/">Docs</a>
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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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<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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</ul>
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</nav>
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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">Change Tile Layer Style</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=cog" class="badge badge-info">cog</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="cog"
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data-content="
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<a class="list-group-item list-group-item-action" href="./cog-stretch.html">Band Contrast Stretch</a>
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<a class="list-group-item list-group-item-action active" href="./cog-style.html">Change Tile Layer Style</a>
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<a class="list-group-item list-group-item-action" href="./cog.html">Cloud Optimized GeoTIFF (COG)</a>
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<a class="list-group-item list-group-item-action" href="./cog-pyramid.html">GeoTIFF tile pyramid</a>
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<a class="list-group-item list-group-item-action" href="./cog-overviews.html">GeoTIFF with Overviews</a>
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<a class="list-group-item list-group-item-action" href="./cog-math.html">NDVI from a Sentinel 2 COG</a>
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<a class="list-group-item list-group-item-action" href="./cog-colors.html">NDVI with a Dynamic Color Ramp</a>
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<a class="list-group-item list-group-item-action" href="./cog-math-multisource.html">NDVI+NDWI from two 16-bit COGs</a>"
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tabindex="0"
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>8</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=webgl" class="badge badge-info">webgl</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="webgl"
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data-content="
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<a class="list-group-item list-group-item-action" href="./cog-stretch.html">Band Contrast Stretch</a>
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<a class="list-group-item list-group-item-action active" href="./cog-style.html">Change Tile Layer Style</a>
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<a class="list-group-item list-group-item-action" href="./heatmap-earthquakes.html">Earthquakes Heatmap</a>
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<a class="list-group-item list-group-item-action" href="./filter-points-webgl.html">Filtering features with WebGL</a>
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<a class="list-group-item list-group-item-action" href="./icon-sprite-webgl.html">Icon Sprites with WebGL</a>
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<a class="list-group-item list-group-item-action" href="./webgl-layer-swipe.html">Layer Swipe (WebGL)</a>
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<a class="list-group-item list-group-item-action" href="./numpytile.html">Rendering 16-bit NumpyTiles</a>
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<a class="list-group-item list-group-item-action" href="./webgl-sea-level.html">Sea Level (with WebGL)</a>
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<a class="list-group-item list-group-item-action" href="./webgl-shaded-relief.html">Shaded Relief (with WebGL)</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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<a class="list-group-item list-group-item-action" href="./webgl-tile-style.html">WebGL Tile Layer Styles</a>
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<a class="list-group-item list-group-item-action" href="./webgl-tiles.html">WebGL Tiles</a>"
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tabindex="0"
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>12</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=style" class="badge badge-info">style</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="style"
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data-content="
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<a class="list-group-item list-group-item-action" href="./animated-gif.html">Animated GIF</a>
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<a class="list-group-item list-group-item-action" href="./cog-stretch.html">Band Contrast Stretch</a>
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<a class="list-group-item list-group-item-action active" href="./cog-style.html">Change Tile Layer Style</a>
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<a class="list-group-item list-group-item-action" href="./polygon-styles.html">Custom Polygon Styles</a>
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<a class="list-group-item list-group-item-action" href="./clusters-dynamic.html">Dynamic clusters</a>
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<a class="list-group-item list-group-item-action" href="./earthquake-clusters.html">Earthquake Clusters</a>
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<a class="list-group-item list-group-item-action" href="./heatmap-earthquakes.html">Earthquakes Heatmap</a>
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<a class="list-group-item list-group-item-action" href="./kml-earthquakes.html">Earthquakes in KML</a>
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<a class="list-group-item list-group-item-action" href="./earthquake-custom-symbol.html">Earthquakes with custom symbols</a>
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<a class="list-group-item list-group-item-action" href="./icon-color.html">Icon Colors</a>
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<a class="list-group-item list-group-item-action" href="./icon-negative.html">Icon Pixel Operations</a>
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<a class="list-group-item list-group-item-action" href="./icon-scale.html">Icon Scale</a>
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<a class="list-group-item list-group-item-action" href="./icon.html">Icon Symbolizer</a>
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<a class="list-group-item list-group-item-action" href="./measure-style.html">Measure using vector styles</a>
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<a class="list-group-item list-group-item-action" href="./regularshape.html">Regular Shapes</a>
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<a class="list-group-item list-group-item-action" href="./style-renderer.html">Style renderer</a>
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<a class="list-group-item list-group-item-action" href="./canvas-gradient-pattern.html">Styling feature with CanvasGradient or CanvasPattern</a>
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<a class="list-group-item list-group-item-action" href="./kml-timezones.html">Timezones in KML</a>
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<a class="list-group-item list-group-item-action" href="./topojson.html">TopoJSON</a>
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<a class="list-group-item list-group-item-action" href="./webgl-tile-style.html">WebGL Tile Layer Styles</a>
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<a class="list-group-item list-group-item-action" href="./wind-arrows.html">Wind Arrows</a>
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<a class="list-group-item list-group-item-action" href="./zoomslider.html">Zoom Sliders</a>"
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tabindex="0"
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>22</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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Set the layer style
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<select id="style">
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<option value="trueColor">True Color</option>
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<option value="falseColor">False Color</option>
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<option value="ndvi">NDVI</option>
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</select>
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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">Updating the style of a WebGL tile layer</p>
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<div id="docs"><p>When you want to change the style of a WebGL tile layer based on some change in your application state, you should use the <code>layer.updateStyleVariables()</code> method. A layer can be efficiently rendered even if style variables are changed on every render frame. In cases where you need to completely replace the style of a layer, you can call the <code>layer.setStyle()</code> method. This method should not be called in response to frequent user events (e.g. mouse movement, dragging a slider, etc.).</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 GeoTIFF from 'ol/source/GeoTIFF';
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import Map from 'ol/Map';
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import TileLayer from 'ol/layer/WebGLTile';
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import View from 'ol/View';
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const max = 3000;
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function normalize(value) {
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return ['/', value, max];
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}
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const red = normalize(['band', 1]);
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const green = normalize(['band', 2]);
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const blue = normalize(['band', 3]);
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const nir = normalize(['band', 4]);
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const trueColor = {
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color: ['array', red, green, blue, 1],
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gamma: 1.1,
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};
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const falseColor = {
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color: ['array', nir, red, green, 1],
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gamma: 1.1,
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};
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const ndvi = {
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color: [
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'interpolate',
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['linear'],
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['/', ['-', nir, red], ['+', nir, red]],
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// color ramp for NDVI values, ranging from -1 to 1
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-0.2,
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[191, 191, 191],
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-0.1,
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[219, 219, 219],
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0,
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[255, 255, 224],
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0.025,
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[255, 250, 204],
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0.05,
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[237, 232, 181],
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0.075,
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[222, 217, 156],
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0.1,
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[204, 199, 130],
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0.125,
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[189, 184, 107],
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0.15,
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[176, 194, 97],
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0.175,
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[163, 204, 89],
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0.2,
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[145, 191, 82],
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0.25,
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[128, 179, 71],
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0.3,
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[112, 163, 64],
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0.35,
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[97, 150, 54],
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0.4,
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[79, 138, 46],
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0.45,
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[64, 125, 36],
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0.5,
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[48, 110, 28],
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0.55,
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[33, 97, 18],
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0.6,
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[15, 84, 10],
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0.65,
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[0, 69, 0],
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],
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};
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const layer = new TileLayer({
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style: trueColor,
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source: new GeoTIFF({
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normalize: false,
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sources: [
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{
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url: 'https://s2downloads.eox.at/demo/EOxCloudless/2020/rgbnir/s2cloudless2020-16bits_sinlge-file_z0-4.tif',
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},
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],
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}),
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});
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const map = new Map({
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target: 'map',
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layers: [layer],
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view: new View({
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projection: 'EPSG:4326',
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center: [0, 0],
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zoom: 2,
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maxZoom: 6,
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}),
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});
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const styles = {trueColor, falseColor, ndvi};
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const styleSelector = document.getElementById('style');
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function update() {
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const style = styles[styleSelector.value];
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layer.setStyle(style);
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}
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styleSelector.addEventListener('change', update);
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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>Change Tile Layer Style</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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Set the layer style
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<select id="style">
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<option value="trueColor">True Color</option>
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<option value="falseColor">False Color</option>
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<option value="ndvi">NDVI</option>
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</select>
|
|
<script src="main.js"></script>
|
|
</body>
|
|
</html></code></pre>
|
|
</div>
|
|
|
|
<div class="row-fluid">
|
|
<h5 class="source-heading">package.json</h5>
|
|
<pre><code id="example-pkg-source" class="language-json">{
|
|
"name": "cog-style",
|
|
"dependencies": {
|
|
"ol": "6.12.0"
|
|
},
|
|
"devDependencies": {
|
|
"parcel": "^2.0.0"
|
|
},
|
|
"scripts": {
|
|
"start": "parcel index.html",
|
|
"build": "parcel build --public-url . index.html"
|
|
}
|
|
}</code></pre>
|
|
</div>
|
|
</div>
|
|
|
|
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
|
|
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.bundle.min.js"></script>
|
|
<script src="./resources/prism/prism-1.20.0.min.js"></script>
|
|
<script src="./resources/common.js"></script>
|
|
<script src="common.js"></script>
|
|
<script src="cog-style.js"></script>
|
|
<script>
|
|
$('#tag-example-list').on('show.bs.modal', function (event) {
|
|
const button = $(event.relatedTarget); // Button that triggered the modal
|
|
const title = button.data('title');
|
|
const content = button.data('content');
|
|
const modal = $(this)
|
|
modal.find('.modal-title').text(title);
|
|
modal.find('.modal-body').html(content);
|
|
});
|
|
|
|
var packageUrl = 'https://raw.githubusercontent.com/openlayers/openlayers.github.io/build/package.json';
|
|
fetch(packageUrl).then(function(response) {
|
|
return response.json();
|
|
}).then(function(json) {
|
|
var latestVersion = json.version;
|
|
document.getElementById('latest-version').innerHTML = latestVersion;
|
|
var url = window.location.href;
|
|
var branchSearch = url.match(/\/([^\/]*)\/examples\//);
|
|
var cookieText = 'dismissed=-' + latestVersion + '-';
|
|
var dismissed = document.cookie.indexOf(cookieText) != -1;
|
|
if (branchSearch && !dismissed && /^v[0-9\.]*$/.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>
|