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GeoJSON and TopoJSON.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
<meta name="description" content="Load GeoJSON or TopoJSON data and apply custom styling.">
<meta name="cesium-sandcastle-labels" content="Showcases, Tutorials, DataSources">
<title>Cesium Demo</title>
<script type="text/javascript" src="../Sandcastle-header.js"></script>
<script type="text/javascript" src="../../../ThirdParty/requirejs-2.1.20/require.js"></script>
<script type="text/javascript">
require.config({
baseUrl : '../../../Source',
waitSeconds : 60
});
</script>
</head>
<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
<style>
@import url(../templates/bucket.css);
</style>
<div id="cesiumContainer" class="fullSize"></div>
<div id="loadingOverlay"><h1>Loading...</h1></div>
<div id="toolbar"></div>
<script id="cesium_sandcastle_script">
function startup(Cesium) {
'use strict';
//Sandcastle_Begin
var viewer = new Cesium.Viewer('cesiumContainer');
//Example 1: Load with default styling.
Sandcastle.addDefaultToolbarButton('Default styling', function() {
viewer.dataSources.add(Cesium.GeoJsonDataSource.load('../../SampleData/ne_10m_us_states.topojson'));
});
//Example 2: Load with basic styling options.
Sandcastle.addToolbarButton('Basic styling', function() {
viewer.dataSources.add(Cesium.GeoJsonDataSource.load('../../SampleData/ne_10m_us_states.topojson', {
stroke: Cesium.Color.HOTPINK,
fill: Cesium.Color.PINK.withAlpha(0.5),
strokeWidth: 3
}));
});
//Example 3: Apply custom graphics after load.
Sandcastle.addToolbarButton('Custom styling', function() {
//Seed the random number generator for repeatable results.
Cesium.Math.setRandomNumberSeed(0);
var promise = Cesium.GeoJsonDataSource.load('../../SampleData/ne_10m_us_states.topojson');
promise.then(function(dataSource) {
viewer.dataSources.add(dataSource);
//Get the array of entities
var entities = dataSource.entities.values;
var colorHash = {};
for (var i = 0; i < entities.length; i++) {
//For each entity, create a random color based on the state name.
//Some states have multiple entities, so we store the color in a
//hash so that we use the same color for the entire state.
var entity = entities[i];
var name = entity.name;
var color = colorHash[name];
if (!color) {
color = Cesium.Color.fromRandom({
alpha : 1.0
});
colorHash[name] = color;
}
//Set the polygon material to our random color.
entity.polygon.material = color;
//Remove the outlines.
entity.polygon.outline = false;
//Extrude the polygon based on the state's population. Each entity
//stores the properties for the GeoJSON feature it was created from
//Since the population is a huge number, we divide by 50.
entity.polygon.extrudedHeight = entity.properties.Population / 50.0;
}
}).otherwise(function(error){
//Display any errrors encountered while loading.
window.alert(error);
});
});
//Reset the scene when switching demos.
Sandcastle.reset = function() {
viewer.dataSources.removeAll();
//Set the camera to a US centered tilted view and switch back to moving in world coordinates.
viewer.camera.lookAt(Cesium.Cartesian3.fromDegrees(-98.0, 40.0), new Cesium.Cartesian3(0.0, -4790000.0, 3930000.0));
viewer.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
};
//Sandcastle_End
Sandcastle.finishedLoading();
}
if (typeof Cesium !== "undefined") {
startup(Cesium);
} else if (typeof require === "function") {
require(["Cesium"], startup);
}
</script>
</body>
</html>