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空间数据可视化：ArcGIS JavaScript API 二、三维数据一体化

2016-05-21 11:45 489 查看
       ESRI不愧为GIS业界巨头，从本科起就开始接触ArcGIS系列，桌面端从ArcMap 到 ArcPro，服务端从ArcIMS 到 ArcServer，无不体现了这个了不起的公司在与时俱进、不断创新。现在的一些列产品好多我都没有用过，像 portal，pro，webbuilder.........网络GIS 现在好像是只更新JavaScript了，GIS与计算机的关系，都被ESRI公司的产品体现的淋漓尽致。今天来劲，就看了下新的API，果然是集美貌与才华于一身的API……



先上个官方的案例，使劲点这里

算了，直接上代码……（每天进步一点点，最后你会发现……与梦想，越来越远！！！）

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<title>Get started with layers - 4.0</title>

<link rel="stylesheet" href="https://js.arcgis.com/4.0/esri/css/main.css">
<script src="https://js.arcgis.com/4.0/"></script>

<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}

#layerToggle {
top: 20px;
right: 20px;
position: absolute;
z-index: 99;
background-color: white;
border-radius: 8px;
padding: 10px;
opacity: 0.75;
}
</style>

<script>
require([
"esri/Map",
"esri/views/SceneView",
"esri/layers/TileLayer",
"dojo/dom",
"dojo/on",
"dojo/domReady!"
],
function(
Map, SceneView, TileLayer, dom, on
) {

/*****************************************************************
* Create two TileLayer instances. One pointing to a
* cached map service depicting U.S. male population and the other
* pointing to a layer of roads and highways.
*****************************************************************/
var transportationLyr = new TileLayer({
url: "https://server.arcgisonline.com/ArcGIS/rest/services/Reference/World_Transportation/MapServer",
// This property can be used to uniquely identify the layer
id: "streets",
visible: false
});

var housingLyr = new TileLayer({
url: "https://tiles.arcgis.com/tiles/nGt4QxSblgDfeJn9/arcgis/rest/services/New_York_Housing_Density/MapServer",
id: "ny-housing",
opacity: 0.9
});

/*****************************************************************
* Layers may be added to the map in the map's constructor
*****************************************************************/
var map = new Map({
basemap: "oceans",
layers: [housingLyr]
});

/*****************************************************************
* Or they may be added to the map using map.add()
*****************************************************************/
map.add(transportationLyr);

var view = new SceneView({
container: "viewDiv",
map: map
});

/*****************************************************************
* The map handles the layers' data while the view and layer views
* take care of renderering the layers
*****************************************************************/
view.on("layerview-create", function(evt) {
if (evt.layer.id === "ny-housing") {
// Explore the properties of the population layer's layer view here
console.log("LayerView for male population created!", evt.layerView);
}
if (evt.layer.id === "streets") {
// Explore the properties of the transportation layer's layer view here
console.log("LayerView for streets created!", evt.layerView);
}
});

/*****************************************************************
* Layers are promises that resolve when loaded, or when all their
* properties may be accessed. Once the population layer has loaded,
* the view will animate to it's initial extent.
*****************************************************************/
view.then(function() {
housingLyr.then(function() {
view.goTo(housingLyr.fullExtent);
});
});

var streetsLyrToggle = dom.byId("streetsLyr");

/*****************************************************************
* The visible property on the layer can be used to toggle the
* layer's visibility in the view. When the visibility is turned off
* the layer is still part of the map, which means you can access
* its properties and perform analysis even though it isn't visible.
*******************************************************************/
on(streetsLyrToggle, "change", function() {
transportationLyr.visible = streetsLyrToggle.checked;
});
});
</script>
</head>

<body>
<div id="viewDiv"></div>
<span id="layerToggle">
<input type="checkbox" id="streetsLyr"> Transportation
</span>
</body>
</html>
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标签：  javascript api 数据可视化 arcgis
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