CesiumJS
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CesiumJS API:https://cesium.com/learn/cesiumjs/ref-doc/index.html
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CesiumJS 是一个开源的 JavaScript 库,它用于在网页中创建和控制 3D 地球仪(地图)
一、带边框的图片图层(Entity polyline)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>ImageryProvider - 带边框的图片图层(Entity polyline)</title>
<link rel="stylesheet" href="../js/Cesium-1.112/Build/Cesium/Widgets/widgets.css" />
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
width: 100%;
height: 100%;
}
.container {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<div id="container"></div>
</body>
<script src="../js/Cesium-1.112/Build/Cesium/Cesium.js"></script>
<script>
const viewer = new Cesium.Viewer("container");
// 图片图层的长宽
const imageWidth = 200; // 单位为米
const imageHeight = 100; // 单位为米
// 图片图层的原点
const originLongitude = 0; // 原点经度
const originLatitude = 0; // 原点纬度
// 在赤道上,每度大约对应 111,320 米
const degreesPerMeterAtEquator = 111320;
const longitudeRange = imageWidth / degreesPerMeterAtEquator;
const latitudeRange = imageHeight / degreesPerMeterAtEquator;
const west = originLongitude; // 西经(西经为负)
const south = originLatitude - latitudeRange; // 南纬(南纬为负)
const east = originLongitude + longitudeRange; // 东经(东经为正)
const north = originLatitude; // 北纬(北纬为正)
// 创建图片图层
const imageryProvider = new Cesium.SingleTileImageryProvider({
url: "../img/test.jpg",
rectangle: Cesium.Rectangle.fromDegrees(west, south, east, north),
});
viewer.imageryLayers.addImageryProvider(imageryProvider);
// 添加边框(西南 -> 西北 -> 东北 -> 东南 -> 西南)
viewer.entities.add({
polyline: {
positions: Cesium.Cartesian3.fromDegreesArray([west, south, west, north, east, north, east, south, west, south]),
width: 5,
material: Cesium.Color.RED,
},
});
// 调整相机视角以查看图片
viewer.camera.flyTo({
destination: Cesium.Cartesian3.fromDegrees(originLongitude, originLatitude, 1000.0),
duration: 2.0,
});
</script>
</html>
二、带边框的图片图层(Entity polygon)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>ImageryProvider - 带边框的图片图层(Entity polygon)</title>
<link rel="stylesheet" href="../js/Cesium-1.112/Build/Cesium/Widgets/widgets.css" />
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
width: 100%;
height: 100%;
}
.container {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<div id="container"></div>
</body>
<script src="../js/Cesium-1.112/Build/Cesium/Cesium.js"></script>
<script>
const viewer = new Cesium.Viewer("container");
// 图片图层的长宽
const imageWidth = 200; // 单位为米
const imageHeight = 100; // 单位为米
// 图片图层的原点
const originLongitude = 0; // 原点经度
const originLatitude = 0; // 原点纬度
// 在赤道上,每度大约对应 111,320 米
const degreesPerMeterAtEquator = 111320;
const longitudeRange = imageWidth / degreesPerMeterAtEquator;
const latitudeRange = imageHeight / degreesPerMeterAtEquator;
const west = originLongitude; // 西经(西经为负)
const south = originLatitude - latitudeRange; // 南纬(南纬为负)
const east = originLongitude + longitudeRange; // 东经(东经为正)
const north = originLatitude; // 北纬(北纬为正)
// 创建图片图层
const imageryProvider = new Cesium.SingleTileImageryProvider({
url: "../img/test.jpg",
rectangle: Cesium.Rectangle.fromDegrees(west, south, east, north),
});
viewer.imageryLayers.addImageryProvider(imageryProvider);
// 添加边框(西南 -> 西北 -> 东北 -> 东南)
viewer.entities.add({
polygon: {
hierarchy: Cesium.Cartesian3.fromDegreesArray([west, south, west, north, east, north, east, south]),
material: Cesium.Color.WHITE.withAlpha(0),
outline: true,
outlineColor: Cesium.Color.RED,
outlineWidth: 20,
height: 0,
},
});
// 调整相机视角以查看图片
viewer.camera.flyTo({
destination: Cesium.Cartesian3.fromDegrees(originLongitude, originLatitude, 1000.0),
duration: 2.0,
});
</script>
</html>
三、带边框的图片图层(Entity rectangle)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>ImageryProvider - 带边框的图片图层(Entity rectangle)</title>
<link rel="stylesheet" href="../js/Cesium-1.112/Build/Cesium/Widgets/widgets.css" />
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,
body {
width: 100%;
height: 100%;
}
.container {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<div id="container"></div>
</body>
<script src="../js/Cesium-1.112/Build/Cesium/Cesium.js"></script>
<script>
const viewer = new Cesium.Viewer("container");
// 图片图层的长宽
const imageWidth = 200; // 单位为米
const imageHeight = 100; // 单位为米
// 图片图层的原点
const originLongitude = 0; // 原点经度
const originLatitude = 0; // 原点纬度
// 在赤道上,每度大约对应 111,320 米
const degreesPerMeterAtEquator = 111320;
const longitudeRange = imageWidth / degreesPerMeterAtEquator;
const latitudeRange = imageHeight / degreesPerMeterAtEquator;
const west = originLongitude; // 西经(西经为负)
const south = originLatitude - latitudeRange; // 南纬(南纬为负)
const east = originLongitude + longitudeRange; // 东经(东经为正)
const north = originLatitude; // 北纬(北纬为正)
// 创建图片图层
const imageryProvider = new Cesium.SingleTileImageryProvider({
url: "../img/test.jpg",
rectangle: Cesium.Rectangle.fromDegrees(west, south, east, north),
});
viewer.imageryLayers.addImageryProvider(imageryProvider);
// 添加边框
viewer.entities.add({
rectangle: {
coordinates: Cesium.Rectangle.fromDegrees(west, south, east, north),
material: Cesium.Color.WHITE.withAlpha(0),
outline: true,
outlineColor: Cesium.Color.RED,
outlineWidth: 20,
height: 0,
},
});
// 调整相机视角以查看图片
viewer.camera.flyTo({
destination: Cesium.Cartesian3.fromDegrees(originLongitude, originLatitude, 1000.0),
duration: 2.0,
});
</script>
</html>