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// Create 50 random features, and give them a "type" attribute that
// will be used for the label text.
var features = new Array(50);
for (var i=0; i<features.length; i++) {
features[i] = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Point(
(360 * Math.random()) - 180, (180 * Math.random()) - 90
), {
type: 5 + parseInt(5 * Math.random())
}
);
}
/**
* Create a style instance that is a collection of rules with symbolizers.
* Use a default symbolizer to extend symoblizers for all rules.
*/
var style = new OpenLayers.Style({
fillColor: "#ffcc66",
strokeColor: "#ff9933",
strokeWidth: 2,
label: "${type}",
fontColor: "#333333",
fontFamily: "sans-serif",
fontWeight: "bold"
}, {
rules: [
new OpenLayers.Rule({
minScaleDenominator: 200000000,
symbolizer: {
pointRadius: 7,
fontSize: "9px"
}
}),
new OpenLayers.Rule({
maxScaleDenominator: 200000000,
minScaleDenominator: 100000000,
symbolizer: {
pointRadius: 10,
fontSize: "12px"
}
}),
new OpenLayers.Rule({
maxScaleDenominator: 100000000,
symbolizer: {
pointRadius: 13,
fontSize: "15px"
}
})
]
});
// Create a vector layer and give it your style map.
var points = new OpenLayers.Layer.Vector("Points", {
styleMap: new OpenLayers.StyleMap(style)
});
points.addFeatures(features);
var map = new OpenLayers.Map({
div: "map",
layers: [
new OpenLayers.Layer.WMS(
"OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0",
{layers: "basic"}
),
points
],
center: new OpenLayers.LonLat(0, 0),
zoom: 1
});
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