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Example for obtaining a Google base map

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By simply defining the ol3 map as control on a GMaps map, we can
have a Google base map with arbitrary ol3 content on top. This
works with all ol3 renderers.
This commit is contained in:
ahocevar
2013-12-20 11:47:19 +01:00
parent 2b46c037d7
commit 6aef5eed74
2 changed files with 111 additions and 0 deletions
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<link rel="stylesheet" href="../css/ol.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<script src="http://maps.google.com/maps/api/js?v=3&amp;sensor=false"></script>
<title>Google Maps integration example</title>
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a class="brand" href="./"><img src="../resources/logo.png"> OpenLayers 3 Examples</a>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
</div>
</div>
<div class="row-fluid">
<div class="span4">
<h4 id="title">Google Maps integration example</h4>
<p id="shortdesc">Example of a GMaps map with an ol3 map as control, to give users a Google base map with ol3 content on top.</p>
<div id="docs">
<p>See the <a href="google-map.js" target="_blank">google-map.js source</a> to see how this is done.</p>
</div>
<div id="tags">google</div>
</div>
</div>
</div>
<script src="jquery.min.js" type="text/javascript"></script>
<script src="loader.js?id=google-map" type="text/javascript"></script>
<script src="../resources/example-behaviour.js" type="text/javascript"></script>
</body>
</html>

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goog.require('ol.Map');
goog.require('ol.RendererHint');
goog.require('ol.View2D');
goog.require('ol.interaction');
goog.require('ol.interaction.DragPan');
goog.require('ol.layer.Vector');
goog.require('ol.parser.GeoJSON');
goog.require('ol.proj');
goog.require('ol.source.Vector');
var gmap = new google.maps.Map(document.getElementById('map'), {
center: new google.maps.LatLng(0, 0),
zoom: 1,
disableDefaultUI: true,
keyboardShortcuts: false,
draggable: false,
disableDoubleClickZoom: true,
scrollwheel: false,
streetViewControl: false
});
var olmap = document.createElement('div');
olmap.style['width'] = '100%';
olmap.style['height'] = '100%';
gmap.controls[google.maps.ControlPosition.TOP_LEFT].push(olmap);
google.maps.event.addListenerOnce(gmap, 'tilesloaded', function() {
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
parser: new ol.parser.GeoJSON(),
url: 'data/countries.geojson'
})
});
var center = gmap.getCenter();
var map = new ol.Map({
layers: [vector],
interactions: ol.interaction.defaults({dragPan: false})
.extend([new ol.interaction.DragPan({kinetic: false})]),
renderer: ol.RendererHint.CANVAS,
target: olmap,
view: new ol.View2D({
center: ol.proj.transform([center.lng(), center.lat()],
'EPSG:4326', 'EPSG:3857'),
zoom: gmap.getZoom()
})
});
var view = map.getView().getView2D();
view.on('change:center', function() {
var center = ol.proj.transform(view.getCenter(),
'EPSG:3857', 'EPSG:4326');
gmap.setCenter(new google.maps.LatLng(center[1], center[0]));
});
view.on('change:resolution', function() {
gmap.setZoom(view.getZoom());
});
});