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arcgis server javascript api 唯一值渲染

2013-03-21 15:32 330 查看 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=7" />
<title>Unique Value Renderer</title>

<link rel="stylesheet" type="text/css" href="http://serverapi.arcgisonline.com/jsapi/arcgis/1.5/js/dojo/dijit/themes/tundra/tundra.css">
<script type="text/javascript">var djConfig = {parseOnLoad: true }</script>
<script type="text/javascript" src= "http://serverapi.arcgisonline.com/jsapi/arcgis/?v=1.5"></script>

<script type="text/javascript" charset="utf-8">
dojo.require("esri.map");
dojo.require("esri.tasks.query");

var map;

function init() {
map = new esri.Map("map", {
extent: new esri.geometry.Extent({xmin:-130.78125,ymin:19.51171875,xmax:-60.46875,ymax:54.66796875,spatialReference:{wkid:4326}}),
slider: false
});
dojo.connect(map, "onLoad", connectErrorHandler);
dojo.connect(map, "onLoad", doQuery);
map.addLayer(new esri.layers.ArcGISTiledMapServiceLayer("http://server.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer"));
}

dojo.addOnLoad(init);

function connectErrorHandler() {
dojo.connect(map.graphics, "onError", errorHandler);
}

function errorHandler(err) {
console.error(err.message);
}

function doQuery() {
var queryTask = new esri.tasks.QueryTask("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/1");
var query = new esri.tasks.Query();
query.where = "1=1";
query.outFields = ["SUB_REGION"];
query.returnGeometry = true;
queryTask.execute(query, addFeatureSetToMap);
}

function addFeatureSetToMap(featureSet) {
//define default symbol for features
var defaultSymbol = new esri.symbol.SimpleFillSymbol().setStyle(esri.symbol.SimpleFillSymbol.STYLE_NULL);
defaultSymbol.outline.setStyle(esri.symbol.SimpleLineSymbol.STYLE_NULL);

//create renderer
var renderer = new esri.renderer.UniqueValueRenderer(defaultSymbol, "SUB_REGION");

//add symbol for each possible value
renderer.addValue("Pacific", new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([255,0,0,0.5])));
renderer.addValue("Mtn", new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([0,255,0,0.5])));
renderer.addValue("N Eng", new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([0,0,255,0.5])));
renderer.addValue("S Atl", new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([255,0,255,0.5])));
renderer.addValue("Mid Atl", new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([255,255,255,0.75])));
renderer.addValue("E N Cen", new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([0,255,255,0.5])));
renderer.addValue("W N Cen", new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([255,255,0,0.5])));
renderer.addValue("E S Cen", new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([127,127,127,0.5])));
renderer.addValue("W S Cen", new esri.symbol.SimpleFillSymbol().setColor(new dojo.Color([0,0,0,0.5])));
map.graphics.setRenderer(renderer);

dojo.forEach(featureSet.features, function(feature) {
map.graphics.add(feature);
});
}

</script>

</head>
<body>
<div id="map" class="tundra" style="width:800px; height:400px; border:1px solid #000;"></div>
</body>
</html>
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