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OpenLayers zoom level display
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> | |
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> | |
<meta name="apple-mobile-web-app-capable" content="yes"> | |
<title>OpenLayers Basic OSM Example with zoom level display</title> | |
<link rel="stylesheet" href="http://www.openlayers.org/dev/theme/default/style.css" type="text/css"> | |
<link rel="stylesheet" href="http://www.openlayers.org/dev/examples/style.css" type="text/css"> | |
<style> | |
.smallmap { | |
border: 1px solid #CCCCCC; | |
height: 720px; | |
width: 1024px; | |
} | |
</style> | |
<script src="http://www.openlayers.org/dev/OpenLayers.js"></script> | |
<script type="text/javascript"> | |
var map, layer; | |
function setDomElement(dom_element) { | |
var text = map.getZoom() + " and the scale is " + map.getScale(); | |
if (dom_element.textContent) { | |
dom_element.textContent = text; | |
} else { | |
dom_element.innerText = text; | |
} | |
} | |
function init() { | |
map = new OpenLayers.Map('map'); | |
layer = new OpenLayers.Layer.OSM("Simple OSM Map"); | |
map.addLayer(layer); | |
var zoomInit = 6; | |
map.setCenter( | |
new OpenLayers.LonLat(-0.18, 46.69).transform( | |
new OpenLayers.Projection("EPSG:4326"), | |
map.getProjectionObject()), zoomInit); | |
selectIdInit = document.getElementById("currentZoom"); | |
setDomElement(selectIdInit); | |
//Where you add an event to retrieve zoom level after zoom | |
map.events.register("zoomend", map, function () { | |
selectId = document.getElementById("currentZoom"); | |
setDomElement(selectId); | |
}); | |
}; | |
</script> | |
</head> | |
<body onload="init()"> | |
<h1 id="title">Basic OSM Example</h1> | |
<div id="tags"> | |
openstreetmap basic light | |
</div> | |
<div id="shortdesc">Show a Simple OSM Map</div> | |
<div id="map" class="smallmap"></div> | |
<div id="docs"> | |
<p>This example shows a very simple OSM layout with minimal controls.</p> | |
<p>It also displays current zoom level <span id="currentZoom">12</span></p> | |
</div> | |
</body> | |
</html> |
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