Cesium 空间量算——生成点位坐标

文章目录

- 需求
- 分析
- - 1. 点击坐标点实现
  - 2. 输入坐标实现

需求

用 Cesium 生成点位坐标，并明显标识

分析

以下是我的两种实现方式
第一种是坐标点击实现
第二种是输入坐标实现

1. 点击坐标点实现

在这里插入图片描述

//点位坐标getLocation() {this.hoverIndex = 0;let that = this;this.viewer.screenSpaceEventHandler.setInputAction(function(movement) {var position = viewer.scene.pickPosition(movement.position);var cartographicPos = Cesium.Cartographic.fromCartesian(position);var lonDegree = Cesium.Math.toDegrees(cartographicPos.longitude);var latDegree = Cesium.Math.toDegrees(cartographicPos.latitude);var text = "经度：" + lonDegree.toFixed(6);text += "\n纬度：";text += latDegree.toFixed(6);text += "\n高度：";text += cartographicPos.height.toFixed(2);text += "米";var labelEntity = viewer.entities.add({position: Cesium.Cartesian3.clone(position),billboard: {position: Cesium.Cartesian3.clone(position),verticalOrigin: Cesium.VerticalOrigin.BOTTOM,image: "/static/images/spaceComputed/menu_icon_lv1_1_trenddraw.png",},label: {text: text,font: "18px sans-serif",horizontalOrigin: Cesium.HorizontalOrigin.LEFT,verticalOrigin: Cesium.VerticalOrigin.BASELINE,style: Cesium.LabelStyle.FILL_AND_OUTLINE,fillColor: Cesium.Color.WHITE,outlineColor: Cesium.Color.RED,outlineWidth: 1.0,heightReference: Cesium.HeightReference.NONE,pixelOffset: new Cesium.Cartesian2(18.0, -18)},});that.pointLocationLabels.push(labelEntity);}, Cesium.ScreenSpaceEventType.LEFT_CLICK);},

2. 输入坐标实现

以下是一个简单的 Cesium 输入生成点位坐标的demo，包含了一个用于输入经纬度和高度的表单和一个用于显示地图的div容器：

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Cesium Demo</title><script src="https://cesium.com/downloads/cesiumjs/releases/1.82/Build/Cesium/Cesium.js"></script><link href="https://cesium.com/downloads/cesiumjs/releases/1.82/Build/Cesium/Widgets/widgets.css" rel="stylesheet"><style>#cesiumContainer {width: 800px;height: 500px;margin: 10px auto;}form {width: 800px;margin: 10px auto;text-align: center;}input[type="text"], input[type="number"] {width: 100px;margin-right: 10px;}input[type="submit"] {padding: 5px 10px;background-color: #4CAF50;color: #fff;border: none;cursor: pointer;}</style>
</head>
<body><div id="cesiumContainer"></div><form method="post">经度：<input type="text" name="lon" id="lon">纬度：<input type="text" name="lat" id="lat">高度：<input type="number" name="height" id="height"><input type="submit" value="生成点位"></form><script>var viewer = new Cesium.Viewer('cesiumContainer');var entity;function addPoint(lon, lat, height) {if (entity) {viewer.entities.remove(entity);}entity = viewer.entities.add({name: 'Point',position: Cesium.Cartesian3.fromDegrees(lon, lat, height),point: {pixelSize: 10,color: Cesium.Color.YELLOW}});viewer.zoomTo(entity);}document.querySelector('form').addEventListener('submit', function (event) {event.preventDefault();var lon = parseFloat(document.querySelector('#lon').value);var lat = parseFloat(document.querySelector('#lat').value);var height = parseFloat(document.querySelector('#height').value) || 0;addPoint(lon, lat, height);});</script>
</body>
</html>