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index.html
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index.html
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<title>Cluster</title>
<link rel="stylesheet" href="http://js.arcgis.com/3.11/dijit/themes/tundra/tundra.css">
<link rel="stylesheet" href="http://js.arcgis.com/3.11/esri/css/esri.css">
<style>
html, body { height: 100%; width: 100%; margin: 0; padding: 0; }
#map{ margin: 0; padding: 0; }
/* center the image in the popup */
.esriViewPopup .gallery { margin: 0 auto !important; }
/* CSS for Cluster Layer */
#clusters_layer > circle { cursor: pointer; }
#clusters_layer > text { cursor: pointer; }
</style>
<script>
// helpful for understanding dojoConfig.packages vs. dojoConfig.paths:
// http://www.sitepen.com/blog/2013/06/20/dojo-faq-what-is-the-difference-packages-vs-paths-vs-aliases/
var dojoConfig = {
paths: {
extras: location.pathname.replace(/\/[^/]+$/, '')
}
};
</script>
<script src="http://js.arcgis.com/3.11/"></script>
<script>
var map;
require([
'dojo/parser',
'dojo/ready',
'dojo/_base/array',
'dojo/_base/Color',
'dojo/dom-style',
'dojo/query',
'esri/map',
'esri/request',
'esri/graphic',
'esri/geometry/Extent',
'esri/symbols/SimpleMarkerSymbol',
'esri/symbols/SimpleLineSymbol',
'esri/symbols/SimpleFillSymbol',
'esri/symbols/PictureMarkerSymbol',
'esri/renderers/ClassBreaksRenderer',
'esri/layers/GraphicsLayer',
'esri/SpatialReference',
'esri/dijit/PopupTemplate',
'esri/geometry/Point',
'esri/geometry/webMercatorUtils',
'extras/ClusterFeatureLayer',
'dijit/layout/BorderContainer',
'dijit/layout/ContentPane',
'dojo/domReady!'
], function(
parser, ready, arrayUtils, Color, domStyle, query,
Map, esriRequest, Graphic, Extent,
SimpleMarkerSymbol, SimpleLineSymbol, SimpleFillSymbol, PictureMarkerSymbol, ClassBreaksRenderer,
GraphicsLayer, SpatialReference, PopupTemplate, Point, webMercatorUtils,
ClusterFeatureLayer
) {
ready(function() {
parser.parse();
var clusterLayer;
var popupOptions = {
'markerSymbol': new SimpleMarkerSymbol('circle', 20, null, new Color([0, 0, 0, 0.25])),
'marginLeft': '20',
'marginTop': '20'
};
map = new Map('map', {
basemap: 'gray',
center: [-118.182, 33.913],
zoom: 10
});
map.on('load', function() {
// hide the popup's ZoomTo link as it doesn't make sense for cluster features
domStyle.set(query('a.action.zoomTo')[0], 'display', 'none');
addClusters();
});
function addClusters(resp) {
// popupTemplate to work with attributes specific to this dataset
var popupTemplate = PopupTemplate({
'title': '',
'fieldInfos': [{
'fieldName': 'TRACTCE10',
'label': 'Tract: ',
visible: true
}, {
'fieldName': 'NAME10',
'label': 'Name: ',
visible: true
}]
});
/*
var popupTemplate = PopupTemplate({
'title': '',
'fieldInfos': [{
'fieldName': 'CaseNum',
'label': 'Case Number: ',
visible: true
}, {
'fieldName': 'Block',
'label': 'Block: ',
visible: true
}, {
'fieldName': 'Descrip',
'label': 'Description: ',
visible: true
}]
});
*/
// cluster layer that uses OpenLayers style clustering
// class break renderer service
// http://services.arcgis.com/V6ZHFr6zdgNZuVG0/ArcGIS/rest/services/CTAStationStats/FeatureServer/0
// simple renderer service
// http://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/ChicagoCrime/FeatureServer/0
clusterLayer = new ClusterFeatureLayer({
'url': 'http://services.arcgis.com/V6ZHFr6zdgNZuVG0/ArcGIS/rest/services/CT2010_pts/FeatureServer/0',
'distance': 100,
'id': 'clusters',
'labelColor': '#fff',
'resolution': map.extent.getWidth() / map.width,
'singleColor': '#888',
'singleTemplate': popupTemplate,
'useDefaultSymbol': true,
'objectIdField': 'FID' // define the objectid field
});
var picBaseUrl = 'http://static.arcgis.com/images/Symbols/Shapes/';
var defaultSym = new PictureMarkerSymbol(picBaseUrl + 'BluePin1LargeB.png', 32, 32).setOffset(0, 15);
var renderer = new ClassBreaksRenderer(defaultSym, 'clusterCount');
var sls = SimpleLineSymbol;
var sms = SimpleMarkerSymbol;
var small = new sms('circle', 20,
new sls(sls.STYLE_SOLID, new Color([255,191,0,0.25]), 15),
new Color([255,191,0,0.5]));
var medium = new sms('circle', 30,
new sls(sls.STYLE_SOLID, new Color([148,0,211,0.25]), 15),
new Color([148,0,211,0.5]));
var large = new sms('circle', 50,
new sls(sls.STYLE_SOLID, new Color([255,0,0,0.25]), 15),
new Color([255,0,0,0.5]));
renderer.addBreak(2, 10, small);
renderer.addBreak(10, 25, medium);
renderer.addBreak(25, 5000, large);
// Providing a ClassBreakRenderer is also optional
//clusterLayer.setRenderer(renderer);
map.addLayer(clusterLayer);
// close the info window when the map is clicked
map.on('click', cleanUp);
// close the info window when esc is pressed
map.on('key-down', function(e) {
if (e.keyCode === 27) {
cleanUp();
}
});
}
function cleanUp() {
map.infoWindow.hide();
//clusterLayer.clearSingles();
}
function error(err) {
console.log('something failed: ', err);
}
// show cluster extents...
// never called directly but useful from the console
window.showExtents = function() {
var extents = map.getLayer('clusterExtents');
if ( extents ) {
map.removeLayer(extents);
}
extents = new GraphicsLayer({ id: 'clusterExtents' });
var sym = new SimpleFillSymbol().setColor(new Color([205, 193, 197, 0.5]));
arrayUtils.forEach(clusterLayer._clusters, function(c, idx) {
var e = c.attributes.extent;
extents.add(new Graphic(new Extent(e[0], e[1], e[2], e[3], map.spatialReference), sym));
}, this);
map.addLayer(extents, 0);
}
});
});
</script>
</head>
<body>
<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>
</div>
</body>
</html>