Hide Table of Contents
Analysis
Data Reviewer
Dynamic Layers
Editing
Feature Layers
Feature Table
Graphics
Map
Mobile
Online and Portal
Popups and Info Windows
Query and Select
Renderers, Symbols, Visualization
Search
Smart Mapping - Render class breaks with color
Explore in the sandbox
Open in CodePen
View live sample
Download as a zip file
Description
This sample is similar to the Generate Renderer sample but uses Smart Mapping functionality introduced at version 3.13. Instead of calling the generateRendererTask to generate a class breaks renderer, it uses the esri/renderers/smartMapping module's createClassedColorRenderer helper method. In this sample, the parameters passed in are the layer, field to classify, basemap, and the classification method used to generate the breaks.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>Generate classed color breaks renderer</title>
<link rel="stylesheet" href="https://js.arcgis.com/3.29/dijit/themes/tundra/tundra.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.29/esri/css/esri.css">
<style>
html,
body {
height: 100%;
width: 100%;
margin: 0;
padding: 0;
}
#map {
margin: 0;
padding: 0;
}
#feedback {
position: absolute;
height: 410px;
font-family: arial;
margin: 5px;
padding: 10px;
z-index: 40;
background: #fff;
color: #444;
width: 300px;
left: 30px;
top: 30px;
box-shadow: 0 0 5px #888;
}
#legendWrapper {
padding: 20px 0 0 0;
}
#note {
font-size: 80%;
font-weight: 700;
padding: 0 0 10px 0;
}
h3 {
margin: 0 0 5px 0;
border-bottom: 1px solid #444;
}
</style>
<script src="https://js.arcgis.com/3.29/"></script>
<script>
//global vars
var layer, legend;
require([
"esri/map",
"esri/dijit/PopupTemplate",
"esri/layers/FeatureLayer",
"esri/dijit/Legend",
"esri/renderers/smartMapping",
"dojo/_base/array",
"dojo/dom",
"dojo/dom-construct",
"dojo/data/ItemFileReadStore",
"dijit/form/FilteringSelect",
"dojo/parser",
"dijit/layout/BorderContainer",
"dijit/layout/ContentPane",
"dojo/domReady!"
], function (
Map,
PopupTemplate,
FeatureLayer,
Legend,
smartMapping,
array,
dom,
domConstruct,
ItemFileReadStore,
FilteringSelect,
parser
) {
parser.parse();
var mapOptions = {
basemap: "terrain",
center: [-123.113, 47.035],
zoom: 7,
slider: false
};
var map = new Map("map", mapOptions);
var fieldName = "POP2007";
// the counties map service uses the actual field name as the field alias
// set up an object to use as a lookup table to work with user friendly field names
var fields = {
"POP2007": "Population(2007)",
"POP07_SQMI": "Population/Square Mile(2007)",
"WHITE": "White",
"BLACK": "Black",
"AMERI_ES": "Native Americans",
"HISPANIC": "Hispanic",
"ASIAN": "Asian",
"HAWN_PI": "Native Hawaiian/Pacific Islander",
"MULT_RACE": "Multiple Races",
"OTHER": "Other"
};
var outFields = ["POP2007", "POP07_SQMI", "WHITE", "BLACK", "AMERI_ES", "ASIAN", "HAWN_PI", "OTHER", "MULT_RACE", "HISPANIC", "STATE_NAME", "NAME"];
//create popup
var popupTemplate = new PopupTemplate({
title: "{NAME} County",
fieldInfos: [{
"fieldName": fieldName,
"label": fields[fieldName],
"visible": true,
"format": {
places: 0,
digitSeparator: true
}
}],
showAttachments: true
});
layer = new FeatureLayer("//sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/2", {
"id": "Washington",
"infoTemplate": popupTemplate,
"mode": FeatureLayer.MODE_SNAPSHOT,
"outFields": outFields,
"opacity": 0.8
});
//only working with Washington state
layer.setDefinitionExpression("STATE_NAME='Washington'");
map.addLayer(layer);
layer.on("load", function () {
createRenderer(fieldName);
});
function createRenderer(field) {
//smart mapping functionality begins
smartMapping.createClassedColorRenderer({
layer: layer,
field: field,
basemap: map.getBasemap(),
classificationMethod: "quantile"
}).then(function (response) {
layer.setRenderer(response.renderer);
layer.redraw();
createLegend(map, layer, field);
});
}
//this function gets called when fields are selected to render
function updateAttribute(ch) {
map.infoWindow.hide();
var popupTemplateUpdated = new PopupTemplate({
title: "{NAME} County",
fieldInfos: [{
"fieldName": ch,
"label": fields[ch],
"visible": true,
"format": { places: 0, digitSeparator: true }
}],
showAttachments: true
});
layer.setInfoTemplate(popupTemplateUpdated);
createRenderer(ch);
layer.redraw();
createLegend(map, layer, ch);
}
//Create a legend
function createLegend(map, layer, field) {
//If applicable, destroy previous legend
if (legend) {
legend.destroy();
domConstruct.destroy(dom.byId("legendDiv"));
}
// create a new div for the legend
var legendDiv = domConstruct.create("div", {
id: "legendDiv"
}, dom.byId("legendWrapper"));
legend = new Legend({
map: map,
layerInfos: [{
layer: layer,
title: "Census Attribute: " + field
}]
}, legendDiv);
legend.startup();
}
// create a store and a filtering select for the county layer's fields
var fieldNames, fieldStore, fieldSelect;
fieldNames = {
"identifier": "value",
"label": "name",
"items": []
};
array.forEach(outFields, function (f) {
if (array.indexOf(f.split("_"), "NAME") == -1) { // exclude attrs that contain "NAME"
fieldNames.items.push({
"name": fields[f],
"value": f
});
}
});
fieldStore = new ItemFileReadStore({
data: fieldNames
});
fieldSelect = new FilteringSelect({
displayedValue: fieldNames.items[0].name,
value: fieldNames.items[0].value,
name: "fieldsFS",
required: false,
store: fieldStore,
searchAttr: "name",
style: {
"width": "290px",
"fontSize": "12pt",
"color": "#444"
}
}, domConstruct.create("div", null, dom.byId("fieldWrapper")));
fieldSelect.on("change", updateAttribute);
});
</script>
</head>
<body class="tundra">
<div data-dojo-type="dijit.layout.BorderContainer" data-dojo-props="design:'headline',gutters:false" style="width: 100%; height: 100%; margin: 0;">
<div id="map" data-dojo-type="dijit.layout.ContentPane" data-dojo-props="region:'center'">
<div id="feedback">
<h3>Washington State</h3>
<div id="info">
Select a field to use to create a renderer for the counties in Washington state.
</div>
<div id="legendWrapper"></div>
<div id="fieldWrapper">
Currently selected attribute:
</div>
</div>
</div>
</div>
</body>
</html>