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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">
<link rel="stylesheet" href="openlayers/theme/default/style.css" type="text/css">
<link rel="stylesheet" href="style.css" type="text/css">
<script src="openlayers/OpenLayers.js"></script>
<script type="text/javascript">
var map;
function init() {
map = new OpenLayers.Map('map',
{controls: [new OpenLayers.Control.Navigation(),
new OpenLayers.Control.PanZoomBar()],
numZoomLevels: 10 });
var wms = new OpenLayers.Layer.WMS(
"OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0",
{layers: 'basic'}
);
map.addLayers([wms]);
map.events.register("moveend", null, displayZoom);
map.zoomToMaxExtent();
update(document.getElementById("fractional"));
}
function displayZoom() {
document.getElementById("zoom").innerHTML = map.zoom.toFixed(4);
}
function update(input) {
map.fractionalZoom = input.checked;
map.zoomTo(Math.round(map.zoom));
}
</script>
</head>
<body onload="init()">
<h1 id="title">Fractional Zoom Example</h1>
<div id="tags">
zoomlevel, unlimited zoom, scale
</div>
<p id="shortdesc">
Shows the use of a map with fractional (or non-discrete) zoom levels.
</p>
<div id="map" class="smallmap"></div>
<input type="checkbox" name="fractional"
id="fractional" checked="checked" onclick="update(this)" />
<label for="fractional">Fractional Zoom</label>
(zoom: <span id="zoom"></span>)
<br><br>
<div id="docs">
<p>
Setting the map.fractionalZoom property to true allows zooming to
an arbitrary level (between the min and max resolutions). This
can be demonstrated by shift-dragging a box to zoom to an arbitrary
extent.
</p>
</div>
</body>
</html>
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