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<!DOCTYPE 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 Labeled Features Example</title>
<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');
var layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0", {layers: 'basic'} );
map.addLayer(layer);
// allow testing of specific renderers via "?renderer=Canvas", etc
var renderer = OpenLayers.Util.getParameters(window.location.href).renderer;
renderer = (renderer) ? [renderer] : OpenLayers.Layer.Vector.prototype.renderers;
var vectorLayer = new OpenLayers.Layer.Vector("Simple Geometry", {
styleMap: new OpenLayers.StyleMap({'default':{
strokeColor: "#00FF00",
strokeOpacity: 1,
strokeWidth: 3,
fillColor: "#FF5500",
fillOpacity: 0.5,
pointRadius: 6,
pointerEvents: "visiblePainted",
// label with \n linebreaks
label : "name: ${name}\n\nage: ${age}",
fontColor: "${favColor}",
fontSize: "12px",
fontFamily: "Courier New, monospace",
fontWeight: "bold",
labelAlign: "${align}",
labelXOffset: "${xOffset}",
labelYOffset: "${yOffset}",
labelOutlineColor: "white",
labelOutlineWidth: 3
}}),
renderers: renderer
});
// create a point feature
var point = new OpenLayers.Geometry.Point(-111.04, 45.68);
var pointFeature = new OpenLayers.Feature.Vector(point);
pointFeature.attributes = {
name: "toto",
age: 20,
favColor: 'red',
align: "cm"
};
// create a polygon feature from a linear ring of points
var pointList = [];
for(var p=0; p<6; ++p) {
var a = p * (2 * Math.PI) / 7;
var r = Math.random(1) + 1;
var newPoint = new OpenLayers.Geometry.Point(point.x + 5 + (r * Math.cos(a)),
point.y + 5 + (r * Math.sin(a)));
pointList.push(newPoint);
}
pointList.push(pointList[0]);
var linearRing = new OpenLayers.Geometry.LinearRing(pointList);
var polygonFeature = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Polygon([linearRing]));
polygonFeature.attributes = {
name: "dude",
age: 21,
favColor: 'purple',
align: 'lb'
};
multiFeature = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Collection([
new OpenLayers.Geometry.LineString([
new OpenLayers.Geometry.Point(-105,40),
new OpenLayers.Geometry.Point(-95,45)
]),
new OpenLayers.Geometry.Point(-105, 40)
]),
{
name: "ball-and-chain",
age: 30,
favColor: 'black',
align: 'rt'
});
// Create a point feature to show the label offset options
var labelOffsetPoint = new OpenLayers.Geometry.Point(-101.04, 35.68);
var labelOffsetFeature = new OpenLayers.Feature.Vector(labelOffsetPoint);
labelOffsetFeature.attributes = {
name: "offset",
age: 22,
favColor: 'blue',
align: "cm",
// positive value moves the label to the right
xOffset: 50,
// negative value moves the label down
yOffset: -15
};
var nullFeature = new OpenLayers.Feature.Vector(null);
nullFeature.attributes = {
name: "toto is some text about the world",
age: 20,
favColor: 'red',
align: "cm"
};
map.addLayer(vectorLayer);
vectorLayer.drawFeature(multiFeature);
map.setCenter(new OpenLayers.LonLat(-109.370078125, 43.39484375), 4);
vectorLayer.addFeatures([pointFeature, polygonFeature, multiFeature, labelOffsetFeature, nullFeature ]);
}
</script>
</head>
<body onload="init()">
<h1 id="title">OpenLayers Labeled features example</h1>
<div id="tags">
vector, feature, labeling, symbolizer, light
</div>
<p id="shortdesc">
Label vector features with a text symbolizer.
</p>
<div id="map" class="smallmap"></div>
<div id="docs">
<p>This example shows drawing simple vector features with a label.</p>
</div>
</body>
</html>
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