ArcgisForJS如何实现添加含图片样式的点要素？

文章目录

0.引言
1.加载底图
2.获取点要素的坐标
3.添加含图片样式的几何要素
4.完整实现

0.引言

ArcGIS API for JavaScript 是一个用于在Web和移动应用程序中创建交互式地图和地理空间分析应用的库。本文在ArcGIS For JavaScript中使用Graphic对象来创建包含图片样式的点要素。

1.加载底图

（1）实现代码

<!DOCTYPE html>
<html>  <head>  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  <title>Create Map</title>  <link rel="stylesheet" href="http://localhost:8099/arcgis_js_api/javascript/4.28/esri/themes/light/main.css" />  <script src="http://localhost:8099/arcgis_js_api/javascript/4.28/init.js"></script>  <style>  html,  body,  #viewDiv {  padding: 0;  margin: 0;  height: 100%;  width: 100%;  }  </style>  <script type="text/javascript">  require(["esri/Map",  "esri/Basemap",  "esri/layers/TileLayer",  "esri/views/MapView",  "esri/layers/GraphicsLayer",  "esri/Graphic"  ], (  Map,  Basemap,  TileLayer,  MapView,  GraphicsLayer,  Graphic  )=>{  //添加底图  var lyTile = new TileLayer({  url:"http://map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetPurplishBlue/MapServer"  });  var baseMap = new Basemap({  baseLayers: [lyTile]  });  var map = new Map({  basemap: baseMap  });  var view = new MapView({  container: "viewDiv",  map: map,  zoom: 16,  center: [106.56657791438427, 29.679927608558902]  });  });  </script>  
</head>  <body>  <div id="viewDiv"></div>  
</body>  </html>

（2）实现结果
在这里插入图片描述

2.获取点要素的坐标

（1）实现代码
在这里插入图片描述

//点击地图获取经纬度坐标
view.on("click", evt => {  let mapPoint = evt.mapPoint;  alert(`经度：${mapPoint.longitude},纬度${mapPoint.latitude}`);  
});

（2）实现结果
在这里插入图片描述

以上获取的坐标作为点要素的坐标，为（经度：106.56651354136791,纬度29.68001149992497）。

3.添加含图片样式的几何要素

（1）实现代码
在这里插入图片描述

//添加含图片样式的几何要素
var graphic = new Graphic({  geometry: point,  symbol: symbol  
});  
var graphicsLayer = new GraphicsLayer();  
graphicsLayer.visible = true;  
var point = {  type: "point",  x: 106.56657791438427,  y: 29.679927608558902,  SpatialReference: 3857  
};  
var symbol = {  type: "picture-marker",  url:"http://img14.360buyimg.com/n1/jfs/t2149/268/1108858690/251183/f7d770d0/5678c41eN59e3de7f.jpg",//访问小车图片  width: "50px",  height: "50px",  outline: {  style: "solid"  },  
};  
var attributes = { name: '小车', content: '真是一辆漂亮的小车' };  
var popupTemplate1 = {  title: "标题:" + attributes.name,  content: "内容:" + attributes.content  
};  
var graphic = new Graphic({  geometry: point,  symbol: symbol,  popupTemplate: popupTemplate1,  
});  
graphicsLayer.graphics.add(graphic);  
map.add(graphicsLayer);

（2）实现结果
在这里插入图片描述

4.完整实现

（1）完整代码

<!DOCTYPE html>
<html>  <head>  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  <title>Create Map</title>  <link rel="stylesheet" href="http://localhost:8099/arcgis_js_api/javascript/4.28/esri/themes/light/main.css" />  <script src="http://localhost:8099/arcgis_js_api/javascript/4.28/init.js"></script>  <style>  html,  body,  #viewDiv {  padding: 0;  margin: 0;  height: 100%;  width: 100%;  }  </style>  <script type="text/javascript">  require(["esri/Map",  "esri/Basemap",  "esri/layers/TileLayer",  "esri/views/MapView",  "esri/layers/GraphicsLayer",  "esri/Graphic"  ], (  Map,  Basemap,  TileLayer,  MapView,  GraphicsLayer,  Graphic  )=>{  //添加底图  var lyTile = new TileLayer({  url:"http://map.geoq.cn/ArcGIS/rest/services/ChinaOnlineStreetPurplishBlue/MapServer"  });  var graphic = new Graphic({  geometry: point,  symbol: symbol  });  //创建一个图层  var graphicsLayer = new GraphicsLayer();  //设置可见  graphicsLayer.visible = true;  //创建一个面  var point = {  type: "point",  x: 106.56657791438427,  y: 29.679927608558902,  SpatialReference: 3857  };  var symbol = {  type: "picture-marker",  url:"http://img14.360buyimg.com/n1/jfs/t2149/268/1108858690/251183/f7d770d0/5678c41eN59e3de7f.jpg",//访问小车图片  width: "50px",  height: "50px",  outline: {  style: "solid"  },  };  var attributes = { name: '小车', content: '真是一辆漂亮的小车' };  var popupTemplate1 = {  title: "标题:" + attributes.name,  content: "内容:" + attributes.content  };  var graphic = new Graphic({  geometry: point,  symbol: symbol,  popupTemplate: popupTemplate1,  });  graphicsLayer.graphics.add(graphic);  var baseMap = new Basemap({  baseLayers: [lyTile]  });  var map = new Map({  basemap: baseMap  });  map.add(graphicsLayer)  var view = new MapView({  container: "viewDiv", // Reference to the DOM node that will contain the view  map: map, // References the map object created in step 3  zoom: 16,  center: [106.56657791438427, 29.679927608558902]  });  //点击地图获取经纬度坐标  //view.on("click", evt => {  //    let mapPoint = evt.mapPoint;  //    alert(`经度：${mapPoint.longitude},纬度${mapPoint.latitude}`);  //});  });  </script>  
</head>  <body>  <div id="viewDiv"></div>  
</body>  </html>

（2）实现结果
在这里插入图片描述

参考资料：
[1] 一入GIS深似海. 不一样的前端，JavaScript之arcgis api教程; 2020-11-02 [accessed 2024-02-22].
[2] 半个GIS半个前端. arcgis api（三）arcgis api for js 4.x 加载高德地图、谷歌地图、天地图; 2018-08-17 [accessed 2024-02-22].
[3] 前端三脚猫. js中的变量声明（var、let、const的区别和解析）; 2021-03-08 [accessed 2024-02-22].

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