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Unique value renderer
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Description
This sample uses a unique value renderer to symbolize the United States. Each state has a string attribute "sub_region" indicating its region of the country. The UniqueValueRenderer.addValue() method is used repeatedly to define a color for each region.
Code
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<title>Unique Value Renderer</title>
<link rel="stylesheet" href="https://js.arcgis.com/3.46/esri/css/esri.css">
<style>
html, body, #map{
height: 100%;
margin: 0;
padding: 0;
}
</style>
<script src="https://js.arcgis.com/3.46/"></script>
<script>
var map;
require([
"esri/map", "esri/layers/FeatureLayer", "esri/InfoTemplate",
"esri/symbols/SimpleLineSymbol", "esri/symbols/SimpleFillSymbol",
"esri/renderers/UniqueValueRenderer", "esri/Color",
"dojo/domReady!"
], function(
Map, FeatureLayer, InfoTemplate,
SimpleLineSymbol, SimpleFillSymbol,
UniqueValueRenderer, Color
) {
map = new Map("map", {
basemap: "streets-vector",
center: [-95.625, 39.243],
zoom: 4,
slider: false
});
map.on("load", addFeatureLayer);
function addFeatureLayer() {
var defaultSymbol = new SimpleFillSymbol().setStyle(SimpleFillSymbol.STYLE_NULL);
defaultSymbol.outline.setStyle(SimpleLineSymbol.STYLE_NULL);
//create renderer
var renderer = new UniqueValueRenderer(defaultSymbol, "sub_region");
//add symbol for each possible value
renderer.addValue("Pacific", new SimpleFillSymbol().setColor(new Color([255, 0, 0, 0.5])));
renderer.addValue("Mtn", new SimpleFillSymbol().setColor(new Color([0, 255, 0, 0.5])));
renderer.addValue("N Eng", new SimpleFillSymbol().setColor(new Color([0, 0, 255, 0.5])));
renderer.addValue("S Atl", new SimpleFillSymbol().setColor(new Color([255, 0, 255, 0.5])));
renderer.addValue("Mid Atl", new SimpleFillSymbol().setColor(new Color([255, 255, 255, 0.75])));
renderer.addValue("E N Cen", new SimpleFillSymbol().setColor(new Color([0, 255, 255, 0.5])));
renderer.addValue("W N Cen", new SimpleFillSymbol().setColor(new Color([255, 255, 0, 0.5])));
renderer.addValue("E S Cen", new SimpleFillSymbol().setColor(new Color([127, 127, 127, 0.5])));
renderer.addValue("W S Cen", new SimpleFillSymbol().setColor(new Color([0, 0, 0, 0.5])));
var featureLayer = new FeatureLayer("https://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/2", {
infoTemplate: new InfoTemplate(" ", "${sub_region}"),
mode: FeatureLayer.MODE_ONDEMAND,
outFields: ["sub_region"]
});
featureLayer.setRenderer(renderer);
map.addLayer(featureLayer);
}
});
</script>
</head>
<body>
<div id="map"></div>
</body>
</html>