2025-03-11 08:25:45 +00:00
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<!--********************************************************************
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* by jiawanlong
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*********************************************************************-->
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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2025-03-19 03:00:22 +00:00
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<link rel="stylesheet" href="./../../libs/cesium/Cesium1.98/Widgets/widgets.css">
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<script type="text/javascript" src="./../../libs/cesium/Cesium1.98/Cesium.js"></script>
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2025-03-11 08:25:45 +00:00
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<script src="./turf.min.js"></script>
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<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
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</head>
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<body style="margin: 0; overflow: hidden; background: #fff; width: 100%; height: 100%; position: absolute; top: 0">
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<div id="map" style="margin: 0 auto; width: 100%; height: 100%"></div>
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<script type="text/javascript">
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2025-06-07 11:30:00 +00:00
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Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiIyMjBhMzcxMC0wNjBiLTRmYjItYjY1MC0wMzAwMzMyMGUyMmEiLCJpZCI6MzAzNzc3LCJpYXQiOjE3NDc2Mzk0NTV9.E_90aKtVdzRGlU2z48VwJ4mWvl-uuDkfQBCOO6zbzn4'
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2025-03-11 08:25:45 +00:00
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const viewer = new Cesium.Viewer('map', {});
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const colors = ["#006837", "#1a9850", "#66bd63", "#a6d96a", "#d9ef8b", "#ffffbf", "#fee08b", "#fdae61", "#f46d43", "#d73027", "#a50026"]
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const breaks = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 99] // 等值面的级数
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axios.get('./windpoint.json')
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.then((response) => {
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showWindLine(response.data.data)
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})
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function showWindLine(arr) {
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const pointGrid = []
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for (let i = 0, len = arr.length; i < len; i++) {
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const item = arr[i]
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pointGrid.push({
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type: "Feature",
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properties: item,
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geometry: {
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type: "Point",
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coordinates: [item.x, item.y]
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}
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})
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}
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const points = {
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type: "FeatureCollection",
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features: pointGrid
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}
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// 等值面
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const geojsonPoly = turf.isobands(points, breaks, {
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zProperty: "speed"
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})
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var promise = Cesium.GeoJsonDataSource.load(geojsonPoly, {
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clampToGround: true,
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});
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promise.then(function (dataSource) {
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viewer.dataSources.add(dataSource);
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var entities = dataSource.entities.values;
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for (var o = 0; o < entities.length; o++) {
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var r = entities[o];
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const val = Number(r._properties.speed._value.split("-")[0] || 0)
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const color = getColor(val)
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r.polygon.material = Cesium.Color.fromCssColorString(color)
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}
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});
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// 等值线
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const geojsonLine = turf.isolines(points, breaks, {
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zProperty: "speed"
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})
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var promise1 = Cesium.GeoJsonDataSource.load(geojsonLine, {
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clampToGround: true,
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});
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promise1.then(function (dataSource) {
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viewer.dataSources.add(dataSource);
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var entities = dataSource.entities.values;
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for (var o = 0; o < entities.length; o++) {
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var r = entities[o];
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r.polyline.material = Cesium.Color.fromCssColorString("#000000")
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}
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});
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}
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function getColor(value) {
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for (let i = 0; i < breaks.length; i++) {
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if (breaks[i] === value) {
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return colors[i]
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}
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}
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return colors[0]
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}
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viewer.camera.setView({
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destination: Cesium.Cartesian3.fromDegrees(100, 30, 4025692.0)
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});
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</script>
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</body>
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</html>
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