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dcopendata_crime_collapsibletree_mapbox.html
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<!DOCTYPE html>
<html>
<head>
<!-- Description: This sample demonstrates how a map can respond to a collapsible tree changes using D3 and Mapbox GL JS API-->
<!-- Attribution:
Collapsible Tree, Url: https://bl.ocks.org/mbostock/4339083;
Mapbox GL JS Examples, Url: https://www.mapbox.com/mapbox-gl-js/example/cluster/
Styling inspired by Esri Story Map: https://storymaps.esri.com/stories/2016/top-stories/
-->
<meta charset='utf-8'>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no'>
<title>Crime Incidents @ Washington, DC</title>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.29.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.29.0/mapbox-gl.css' rel='stylesheet' />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.2/dist/leaflet.css" />
<script src="https://unpkg.com/leaflet@1.0.2/dist/leaflet.js"></script>
<!--this is a separate json file that stores the nested data used for querying
if you want to use the sample for something else, you will need to generate
a new one, either static (as we have) or dynamic (totally possible using D3.nest())-->
<script src="DCCrimeTree.js"></script>
<link rel="shortcut icon" type="image/x-icon" href="https://dc.gov/sites/default/files/favicon_0.ico">
<style>
.node {
cursor: pointer;
}
.node circle {
fill: #fff;
stroke: #000;
stroke-width: 1.5px;
}
.node text {
font: 12px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
body {
color: #404040;
font: 400 15px/22px;
margin: 0;
padding: 0;
-webkit-font-smoothing: antialiased;
font-family: "open_sanssemi", sans-serif;
}
* {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.sidebar {
position: absolute;
width: 700px;
top: 70;
left: 0;
overflow: hidden;
border-right: 1px solid rgba(0, 0, 0, 0.25);
border: 0px solid blue;
z-index: 300;
box-shadow: 8px 0px 5px -5px #bdbcbc;
}
.map {
position: absolute;
right: 0;
top: 70px;
bottom: 0;
border: 0px solid red;
}
/* Marker tweaks */
.leaflet-popup-close-button {
display: none;
}
.leaflet-popup-content {
font: 400 15px/22px 'Source Sans Pro', 'Helvetica Neue', Sans-serif;
padding: 0;
width: 200px;
}
.leaflet-popup-content-wrapper {
padding: 0;
}
.leaflet-popup-content h3 {
background: #91c949;
color: #fff;
margin: 0;
display: block;
padding: 10px;
border-radius: 3px 3px 0 0;
font-weight: 700;
margin-top: -15px;
}
.leaflet-popup-content div {
padding: 10px;
}
.leaflet-container .leaflet-marker-icon {
cursor: pointer;
}
.mapboxgl-popup-anchor-bottom .mapboxgl-popup-tip {
border-top-color: #505050;
}
.mapboxgl-popup-content {
background: #505050;
color: #fff;
}
/*styling for title bar and about pop over */
a {
color: #fff;
font-family: 'open_sansregular', sans-serif;
}
#geojson-url,
#data-src-url {
padding: 0px;
color: #fff;
font-weight: normal;
display: inline;
font-size: 14px;
}
#geojson-url a,
#data-src-url a {
color: white;
}
#title {
color: #fff;
font-family: "open_sanssemibold", sans-serif;
padding: 3 0 0 4;
font-size: 24px;
line-height: 30px;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.header {
position: relative;
padding: 15px 30px 25px 30px;
margin: auto;
z-index: 500;
background-color: rgb(12, 12, 12);
box-shadow: 0 3px 5px 0 rgba(0, 0, 0, .75);
opacity: 0.8;
height: 70px;
}
#about {
padding: 10px 20px 20px 20px;
z-index: 4000;
position: absolute;
background-color: #505050;
color: white;
width: 700px;
left: 50%;
margin-left: -300px;
height: calc(100% - 200px);
top: 100px;
display: none;
overflow: hidden;
opacity: 0.95;
}
#dismiss-about {
cursor: pointer;
font-size: 30px;
float: right;
margin-bottom: 10px;
}
#inner {
width: 100%;
height: calc(100% - 60px);
overflow-y: auto;
-webkit-overflow-scrolling: touch;
}
</style>
</head>
<body>
<div class='header'>
<div id="title">Crime Incidents @ Washington, DC</div>
<div style="float:right">
<a style="color:rgb(206,206,206);font-size:14px; margin-right: 10px;" href="https://github.com/DCgov/opendatadc-starterkit" target="_blank">This on Github</a>
<a style="color:rgb(206,206,206);font-size:14px; " href="javascript:void(0)" onclick="openAbout()">About This Map</a>
</div>
</div>
<div id='tree' class="sidebar"></div>
<div id='map' class='map'>
</div>
<div id="about">
<a id="dismiss-about" onclick="closeAbout()">×</a>
<div id="inner">
<p style="font-size: 1.4em; text-transform: uppercase; text-align: center">
About this map
</p>
<p style="font-size: 1.2em;">This sample demonstrates how to use a collapsible tree to drive map selections using D3 and Mapbox GL JS API.</p>
<p>
<strong>Instructions</strong>
<br> Use tree view to explore DC crime incidents by different categories, when select leaf node, the related crime data will be added on the map.
</p>
<p>
<strong>Built with...</strong>
<br><a href="https://www.mapbox.com/mapbox-gl-js/api/">Mapbox GL JS</a>, <a href="https://d3js.org/">D3</a>, <a href="https://jquery.com/">jQuery</a>
</p>
<p>
<strong>Download Crime Incidents Data in GeoJSON</strong>
<br>
<span id="geojson-url">
</span>
</p>
<p>
<strong>View Crime Incidents Data on DC Open Data</strong>
<br>
<span id="data-src-url">
</span>
</p><p>
<strong>DC Open Data</strong>
<br><a href="http://opendata.dc.gov" target="_blank">http://opendata.dc.gov</a>
</p>
<p>
<strong>DC Open Data Samples</strong>
<br> <a href="https://github.com/DCgov/opendatadc-starterkit" target="_blank">https://github.com/DCgov/opendatadc-starterkit</a>
</p>
<div id="logos" style="text-align: center">
<img src="images\WeAreWashintgonDCFinalLogo-Website.png" title="We are DC logo">
</div>
</div>
</div>
<script>
/* main window operations */
var windowInHeight = window.innerHeight;
var sideBarWidth = 700;
var topBarHeight = 70;
var rootLabelWidth = 120;
/* resize map to fit window, saving space for side bar */
var mapWidth = $(window).width() - sideBarWidth;
$("#map").css('width', mapWidth);
$(window).resize(function () {
var mapWidth = $(window).width() - sideBarWidth;
$("#map").css('width', mapWidth);
});
/* start by creating the collapsible tree */
var i = 0,
duration = 750, //animation duration
root; //tree data source
var tree = d3.layout.tree()
.size([windowInHeight - topBarHeight, sideBarWidth]);
// diagonal generator to create curved path
var diagonal = d3.svg.diagonal()
.projection(function (d) {
return [d.y, d.x];
});
var svg = d3.select("#tree").append("svg")
.attr("width", "100%")
.attr("height", windowInHeight - topBarHeight - 6)
.append("g")
.attr("transform", "translate(" + rootLabelWidth + ", 0)");
$(document).ready(function () {
root = dcCrimeDataTree; //source data in tree structure, from DCCrimeTree.js
root.x0 = windowInHeight / 2;
root.y0 = 0;
//collapse all children in the branch
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
root.children.forEach(collapse);
update(root);
});
d3.select(self.frameElement).style("height", "100%");
//update the tree chart when tree's bound data changes.
//change in this scenario could be children hiding or showing
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function (d) {
d.y = d.depth * 120;
});
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function (d) {
return d.id || (d.id = ++i);
});
// create any new nodes (enter nodes) at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function (d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.on("click", click);
//draw a circle
nodeEnter.append("circle")
.attr("r", 1e-6) //1e-6=0.000001, best practice to use 1e-6 rather than 0 to avoid invalid css attribute
.style("fill", function (d) {
return d._children ? "#808080" : "#fff";
});
//add node label
nodeEnter.append("text")
.attr("x", function (d) {
return d.children || d._children ? -10 : 10;
})
.attr("dy", ".35em")
.attr("text-anchor", function (d) {
return d.children || d._children ? "end" : "start";
})
.text(function (d) {
return d.name;
})
.style("fill-opacity", 1e-6);
// Transition new nodes to their new position
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function (d) {
return "translate(" + d.y + "," + d.x + ")";
});
// resize circle radius
nodeUpdate.select("circle")
.attr("r", 5)
.style("fill", function (d) {
return d._children ? "#808080" : "#fff";
});
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function (d) {
return "translate(" + source.y + "," + source.x + ")";
})
.remove();
nodeExit.select("circle")
.attr("r", 1e-6); // resize to minimum while transition
nodeExit.select("text")
.style("fill-opacity", 1e-6); //make invisible while transition
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function (d) {
return d.target.id;
});
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function (d) {
var o = {
x: source.x0,
y: source.y0
};
//generate link path from source to target using diagonal generator
return diagonal({
source: o,
target: o
});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function (d) {
var o = {
x: source.x,
y: source.y
};
return diagonal({
source: o,
target: o
});
})
.remove();
// Store the old positions for transition.
nodes.forEach(function (d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
// update map if node is leaf
if ((d.children == null) && (d._children == null)) {
updateMap(d);
}
if (d.children) {
d._children = d.children; //store children in temp var
d.children = null; //hide children
} else {
d.children = d._children; //restore children from temp var, show children
d._children = null;
}
update(d);
}
/* MAP stuff starts here*/
var dcwardGeoJsonUrl = "https://opendata.arcgis.com/datasets/0ef47379cbae44e88267c01eaec2ff6e_31.geojson";
var crimeDataSources = [
{ key: "30days", value: "https://opendata.arcgis.com/datasets/dc3289eab3d2400ea49c154863312434_8" },
{ key: "2016", value: "https://opendata.arcgis.com/datasets/bda20763840448b58f8383bae800a843_26" },
{ key: "2015", value: "https://opendata.arcgis.com/datasets/35034fcb3b36499c84c94c069ab1a966_27" },
{ key: "2014", value: "https://opendata.arcgis.com/datasets/6eaf3e9713de44d3aa103622d51053b5_9" },
{ key: "2013", value: "https://opendata.arcgis.com/datasets/5fa2e43557f7484d89aac9e1e76158c9_10" },
{ key: "2012", value: "https://opendata.arcgis.com/datasets/010ac88c55b1409bb67c9270c8fc18b5_11" }
];
/* populate data source links on about box */
var linkListHtml;
var linkListHtmls = [];
crimeDataSources.forEach(function (source, i) {
var dataSourceURL = source["value"];
linkListHtmls.push("<a href='" + dataSourceURL + ".geojson' " + "id='a" + i + "'>" + source["key"] + "</a>");
});
linkListHtml=linkListHtmls.join(" ")
$('#geojson-url').html(linkListHtml);
linkListHtml = linkListHtml.replace(".geojson", "");
$('#data-src-url').html(linkListHtml);
var crimeDataArray = [];
var currentLayer = null;
var nonClusterLyrId = "non-cluster-layer";
var wardLayer = null;
//Replace with your own token
mapboxgl.accessToken = "pk.eyJ1Ijoib2N0b2RjIiwiYSI6ImNpeWRjZm0yNDAwMDUzMGs1Z3JyZmd2NXQifQ.Y8a2TFYzj-5Oy3hTVb9cfw";
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v9',
center: [-77.034084142948, 38.909671288923],
zoom: 11
});
var popup = new mapboxgl.Popup({
closeOnClick: false,
closeButton: false
});
/* legend for mapbox clustering */
var clusterLayerColors = [
[150, '#ff0000'],
[20, '#FFC300'],
[0, '#51bbd6']
];
/* add wards layer to map*/
map.on('load', function () {
map.addSource('dcward', {
'type': 'geojson',
'data': dcwardGeoJsonUrl
});
map.addLayer({
'id': 'dcward-layer',
'type': 'fill',
'source': 'dcward',
'paint': {
'fill-color': 'rgba(200, 100, 240, 0.1)',
'fill-outline-color': 'rgba(200, 100, 240, 2)'
}
});
$.getJSON(dcwardGeoJsonUrl, function (dt) {
wardLayer = L.geoJson(dt, {});
});
getCrimeGeoJsonData();
});
/* load all crime data at once into array */
function getCrimeGeoJsonData() {
crimeDataSources.forEach(function (source, i) {
var dataSourceURL = source["value"];
d3.json(dataSourceURL + ".geojson", function (err, data) {
if (data) {
var crimeObj = {
dataName: "crime" + source["key"],
dataSource: dataSourceURL,
dataAPI: dataSourceURL + "_geojson",
geojsonData: data,
};
crimeDataArray.push(crimeObj);
}
});
});
}
//Update map layers when user clicks a leaf node
function updateMap(data) {
var selectedData = [];
var filteredData = {};
var selectedSourceData;
var wardBounds = new mapboxgl.LngLatBounds();
//pick data source
$.each(crimeDataArray, function (i, obj) {
if (obj.dataName == data.dataName) {
selectedSourceData = obj.geojsonData;
return false;
}
});
//by month
if (data.type) {
$.each(selectedSourceData.features, function (i, d) {
var tmp = Date.parse(d.properties.REPORTDATETIME);
d.properties.month = new Date(tmp).getMonth() + 1;
if (d.properties.month.toString() == data.keyValue) {
selectedData.push(d);
}
});
} else {
$.each(selectedSourceData.features, function (i, d) {
if (d.properties[data.keyName.toUpperCase()] == data.keyValue.toUpperCase()) {
selectedData.push(d);
}
});
}
filteredData.features = selectedData;
filteredData.type = "FeatureCollection";
//We need to use add-remove layers to mannually update clusters here because setfilter on attributes does not work for cluster layers
//Please refer to https://github.com/mapbox/mapbox-gl-js/issues/2626
if (currentLayer) {
//remove existing data source
map.removeSource(currentLayer.id);
//remove existing non-cluster layer
map.removeLayer(currentLayer.id);
//Remove existing cluster layers
for (var k = 0; k < clusterLayerColors.length; k++) {
map.removeLayer("cluster-" + k);
}
// Remove existing label layer
map.removeLayer("cluster-count");
}
map.addSource(data.dataName, {
'type': 'geojson',
cluster: true,
clusterMaxZoom: 14, // Max zoom to cluster points on
clusterRadius: 50, // Radius of each cluster when clustering points (defaults to 50)
'data': filteredData
});
//add non-cluster layer
map.addLayer({
"id": data.dataName,
"type": "circle",
"source": data.dataName,
"paint": {
"circle-color": "red",
"circle-opacity": 0.75,
"circle-radius": 5
},
"filter": ["!has", "point_count"]
});
//add cluster layers
clusterLayerColors.forEach(function (layer, i) {
map.addLayer({
"id": "cluster-" + i,
"type": "circle",
"source": data.dataName,
"paint": {
"circle-color": layer[1],
"circle-radius": 10 * (4 - i),
"circle-opacity": 0.6,
"circle-stroke-width": 1,
"circle-stroke-color": layer[1]
},
"filter": i == 0 ? [">=", "point_count", layer[0]] : ["all", [">=", "point_count", layer[0]],
["<", "point_count", clusterLayerColors[i - 1][0]]
]
});
});
// Add a layer for the clusters' count labels
map.addLayer({
"id": "cluster-count",
"type": "symbol",
"source": data.dataName,
"layout": {
"text-field": "{point_count}",
"text-font": [
"DIN Offc Pro Medium",
"Arial Unicode MS Bold"
],
"text-size": 12
}
});
//Attach mouseover and mousemove event listener
if (!currentLayer) {
map.on('mousemove', function (e) {
var features = map.queryRenderedFeatures(e.point, {
layers: [nonClusterLyrId]
});
// Change the cursor style as a UI indicator.
map.getCanvas().style.cursor = (features.length) ? 'pointer' : '';
});
map.on('click', function (e) {
var features = map.queryRenderedFeatures(e.point, {
layers: [nonClusterLyrId]
});
popup.remove();
if (!features.length) {
popup.remove();
return;
}
if ((features.length == 1) && (!features[0].properties.point_count)) {
var feature = features[0];
var cont = "Time: " + feature.properties.REPORTDATETIME + "<br>Crime: " + feature.properties.OFFENSE + "<br>Location: " + feature.properties.BLOCKSITEADDRESS;
/* Use wrapped coordinates to ensure longitude is within (180, -180);
(generally, not a problem in this part of the world) */
var coords = feature.geometry.coordinates;
var ll = new mapboxgl.LngLat(coords[0], coords[1]);
var wrapped = ll.wrap();
popup.setLngLat(wrapped)
.setHTML(cont)
.addTo(map);
}
});
}
currentLayer = map.getLayer(data.dataName);
nonClusterLyrId = data.dataName;
//zoom to ward or zoom to full DC
var bounds = null;
if (data.keyName == "WARD") {
wardLayer.eachLayer(function (layer) {
if (layer.feature.properties["WARD_ID"] == data.keyValue) {
bounds = layer.getBounds();
}
});
} else { //use wards layer to get extent
bounds = wardLayer.getBounds();
}
var minLngLat = [bounds._southWest.lng, bounds._southWest.lat];
var maxLngLat = [bounds._northEast.lng, bounds._northEast.lat];
map.fitBounds([minLngLat, maxLngLat]);
return;
}
//open About This panel
function openAbout() {
$("#about").show();
return false;
}
//close About This panel
function closeAbout() {
$("#about").hide();
return false;
}
</script>
</body>
</html>