Add vectortile branch
This commit is contained in:
Andreas Hocevar
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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="chrome=1">
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<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css" type="text/css">
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" type="text/css">
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<link rel="stylesheet" href="./resources/prism/prism.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="http://d3js.org/d3.v3.min.js"></script>
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<script src="http://d3js.org/topojson.v1.min.js"></script>
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<script src="./resources/zeroclipboard/ZeroClipboard.min.js"></script>
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<title>d3 integration example</title>
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</head>
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<body>
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<header class="navbar" role="navigation">
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<div class="container" id="navbar-inner-container">
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<a class="navbar-brand" href="./"><img src="./resources/logo-70x70.png"> OpenLayers 3 Examples</a>
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</div>
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</header>
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<div class="container-fluid">
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<div class="row-fluid">
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<div class="span12">
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<div id="map" class="map"></div>
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</div>
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</div>
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<div class="row-fluid">
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<div class="span12">
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<h4 id="title">d3 integration example</h4>
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<p id="shortdesc">Example of using ol3 and d3 together.</p>
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<div id="docs"><p>The example loads TopoJSON geometries and uses d3 (<code>d3.geo.path</code>) to render these geometries to a canvas element that is then used as the image of an ol3 image layer.</p>
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</div>
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<div id="tags">d3</div>
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<div id="api-links">Related API documentation: <ul class="inline"><li><a href="../apidoc/ol.Map.html" title="API documentation for ol.Map">ol.Map</a></li>,<li><a href="../apidoc/ol.View.html" title="API documentation for ol.View">ol.View</a></li>,<li><a href="../apidoc/ol.extent.html" title="API documentation for ol.extent">ol.extent</a></li>,<li><a href="../apidoc/ol.layer.Image.html" title="API documentation for ol.layer.Image">ol.layer.Image</a></li>,<li><a href="../apidoc/ol.layer.Tile.html" title="API documentation for ol.layer.Tile">ol.layer.Tile</a></li>,<li><a href="../apidoc/ol.proj.html" title="API documentation for ol.proj">ol.proj</a></li>,<li><a href="../apidoc/ol.source.ImageCanvas.html" title="API documentation for ol.source.ImageCanvas">ol.source.ImageCanvas</a></li>,<li><a href="../apidoc/ol.source.Stamen.html" title="API documentation for ol.source.Stamen">ol.source.Stamen</a></li></ul></div>
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</div>
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</div>
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<div class="row-fluid">
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<div id="source-controls">
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<a id="copy-button"><i class="fa fa-clipboard"></i> Copy</a>
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<a id="jsfiddle-button"><i class="fa fa-jsfiddle"></i> Edit</a>
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</div>
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<form method="POST" id="jsfiddle-form" target="_blank" action="http://jsfiddle.net/api/post/jquery/1.11.0/">
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<textarea class="hidden" name="js">// NOCOMPILE
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// this example uses d3 for which we don't have an externs file.
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var map = new ol.Map({
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layers: [
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new ol.layer.Tile({
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source: new ol.source.Stamen({
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layer: 'watercolor'
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})
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})
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],
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target: 'map',
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view: new ol.View({
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center: ol.proj.fromLonLat([-97, 38]),
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zoom: 4
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})
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});
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/**
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* Load the topojson data and create an ol.layer.Image for that data.
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*/
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d3.json('data/topojson/us.json', function(error, us) {
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var features = topojson.feature(us, us.objects.counties);
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/**
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* This function uses d3 to render the topojson features to a canvas.
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* @param {ol.Extent} extent Extent.
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* @param {number} resolution Resolution.
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* @param {number} pixelRatio Pixel ratio.
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* @param {ol.Size} size Size.
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* @param {ol.proj.Projection} projection Projection.
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* @return {HTMLCanvasElement}
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*/
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var canvasFunction = function(extent, resolution, pixelRatio,
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size, projection) {
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var canvasWidth = size[0];
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var canvasHeight = size[1];
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var canvas = d3.select(document.createElement('canvas'));
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canvas.attr('width', canvasWidth).attr('height', canvasHeight);
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var context = canvas.node().getContext('2d');
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var d3Projection = d3.geo.mercator().scale(1).translate([0, 0]);
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var d3Path = d3.geo.path().projection(d3Projection);
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var pixelBounds = d3Path.bounds(features);
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var pixelBoundsWidth = pixelBounds[1][0] - pixelBounds[0][0];
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var pixelBoundsHeight = pixelBounds[1][1] - pixelBounds[0][1];
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var geoBounds = d3.geo.bounds(features);
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var geoBoundsLeftBottom = ol.proj.transform(
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geoBounds[0], 'EPSG:4326', projection);
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var geoBoundsRightTop = ol.proj.transform(
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geoBounds[1], 'EPSG:4326', projection);
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var geoBoundsWidth = geoBoundsRightTop[0] - geoBoundsLeftBottom[0];
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if (geoBoundsWidth < 0) {
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geoBoundsWidth += ol.extent.getWidth(projection.getExtent());
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}
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var geoBoundsHeight = geoBoundsRightTop[1] - geoBoundsLeftBottom[1];
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var widthResolution = geoBoundsWidth / pixelBoundsWidth;
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var heightResolution = geoBoundsHeight / pixelBoundsHeight;
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var r = Math.max(widthResolution, heightResolution);
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var scale = r / (resolution / pixelRatio);
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var center = ol.proj.transform(ol.extent.getCenter(extent),
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projection, 'EPSG:4326');
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d3Projection.scale(scale).center(center)
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.translate([canvasWidth / 2, canvasHeight / 2]);
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d3Path = d3Path.projection(d3Projection).context(context);
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d3Path(features);
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context.stroke();
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return canvas[0][0];
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};
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var layer = new ol.layer.Image({
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source: new ol.source.ImageCanvas({
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canvasFunction: canvasFunction,
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projection: 'EPSG:3857'
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})
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});
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map.addLayer(layer);
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});
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</textarea>
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<textarea class="hidden" name="css"></textarea>
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<textarea class="hidden" name="html"><div class="row-fluid">
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<div class="span12">
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<div id="map" class="map"></div>
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</div>
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</div>
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</textarea>
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<input type="hidden" name="wrap" value="l">
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<input type="hidden" name="resources" value="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css,https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js,http://openlayers.org/en/v3.8.2/css/ol.css,http://openlayers.org/en/v3.8.2/build/ol.js">
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</form>
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<pre><code id="example-source" class="language-markup"><!DOCTYPE html>
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<html>
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<head>
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<title>d3 integration example</title>
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<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<link rel="stylesheet" href="http://openlayers.org/en/v3.8.2/css/ol.css" type="text/css">
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<script src="http://openlayers.org/en/v3.8.2/build/ol.js"></script>
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<script src="http://d3js.org/d3.v3.min.js"></script>
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<script src="http://d3js.org/topojson.v1.min.js"></script>
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</head>
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<body>
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<div class="container-fluid">
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<div class="row-fluid">
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<div class="span12">
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<div id="map" class="map"></div>
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</div>
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</div>
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</div>
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<script>
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// NOCOMPILE
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// this example uses d3 for which we don't have an externs file.
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var map = new ol.Map({
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layers: [
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new ol.layer.Tile({
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source: new ol.source.Stamen({
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layer: 'watercolor'
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})
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})
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],
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target: 'map',
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view: new ol.View({
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center: ol.proj.fromLonLat([-97, 38]),
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zoom: 4
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})
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});
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/**
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* Load the topojson data and create an ol.layer.Image for that data.
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*/
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d3.json('data/topojson/us.json', function(error, us) {
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var features = topojson.feature(us, us.objects.counties);
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/**
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* This function uses d3 to render the topojson features to a canvas.
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* @param {ol.Extent} extent Extent.
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* @param {number} resolution Resolution.
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* @param {number} pixelRatio Pixel ratio.
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* @param {ol.Size} size Size.
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* @param {ol.proj.Projection} projection Projection.
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* @return {HTMLCanvasElement}
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*/
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var canvasFunction = function(extent, resolution, pixelRatio,
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size, projection) {
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var canvasWidth = size[0];
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var canvasHeight = size[1];
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var canvas = d3.select(document.createElement('canvas'));
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canvas.attr('width', canvasWidth).attr('height', canvasHeight);
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var context = canvas.node().getContext('2d');
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var d3Projection = d3.geo.mercator().scale(1).translate([0, 0]);
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var d3Path = d3.geo.path().projection(d3Projection);
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var pixelBounds = d3Path.bounds(features);
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var pixelBoundsWidth = pixelBounds[1][0] - pixelBounds[0][0];
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var pixelBoundsHeight = pixelBounds[1][1] - pixelBounds[0][1];
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var geoBounds = d3.geo.bounds(features);
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var geoBoundsLeftBottom = ol.proj.transform(
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geoBounds[0], 'EPSG:4326', projection);
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var geoBoundsRightTop = ol.proj.transform(
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geoBounds[1], 'EPSG:4326', projection);
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var geoBoundsWidth = geoBoundsRightTop[0] - geoBoundsLeftBottom[0];
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if (geoBoundsWidth < 0) {
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geoBoundsWidth += ol.extent.getWidth(projection.getExtent());
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}
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var geoBoundsHeight = geoBoundsRightTop[1] - geoBoundsLeftBottom[1];
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var widthResolution = geoBoundsWidth / pixelBoundsWidth;
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var heightResolution = geoBoundsHeight / pixelBoundsHeight;
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var r = Math.max(widthResolution, heightResolution);
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var scale = r / (resolution / pixelRatio);
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var center = ol.proj.transform(ol.extent.getCenter(extent),
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projection, 'EPSG:4326');
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d3Projection.scale(scale).center(center)
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.translate([canvasWidth / 2, canvasHeight / 2]);
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d3Path = d3Path.projection(d3Projection).context(context);
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d3Path(features);
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context.stroke();
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return canvas[0][0];
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};
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var layer = new ol.layer.Image({
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source: new ol.source.ImageCanvas({
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canvasFunction: canvasFunction,
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projection: 'EPSG:3857'
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})
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});
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map.addLayer(layer);
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});
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</script>
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</body>
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</html></code></pre>
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</div>
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</div>
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<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<script src="./resources/common.js"></script>
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<script src="./resources/prism/prism.min.js"></script>
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<script src="loader.js?id=d3"></script>
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</body>
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</html>
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