您好，我目前正在使用自己的 map 创建一个 javascript/html 网络应用程序。到目前为止，我所做的是在 javascript 中引用我的 id，遵循本教程 ArcGIS: Webmap by ID . map 在我的 HTML 页面上使用以下脚本显示
<script>
var textSymbol, picSymbol;
require([
"dojo/parser",
"dojo/ready",
"dijit/layout/BorderContainer",
"dijit/layout/ContentPane",
"dojo/dom",
"esri/map",
//// map
// "esri/graphic",
// "esri/symbols/PictureMarkerSymbol",
// "esri/symbols/TextSymbol",
// "esri/geometry/Point",
// "esri/SpatialReference",
// "esri/tasks/ProjectParameters",
// "esri/tasks/GeometryService",
////
"esri/urlUtils",
"esri/arcgis/utils",
"esri/dijit/Legend",
"esri/dijit/Scalebar",
"esri/dijit/LocateButton", //
"esri/layers/FeatureLayer",
////
//"dojo/on",
////
"dojo/domReady!"
], function (
parser,
ready,
BorderContainer,
ContentPane,
dom,
Map,
//
//Graphic, PictureMarkerSymbol, TextSymbol, Point, SpatialReference, ProjectParameters, GeometryService,
//
urlUtils,
arcgisUtils,
Legend,
Scalebar,
LocateButton, //
FeatureLayer,
//
on
//
) {
ready(function () {
parser.parse();
//if accessing webmap from a portal outside of ArcGIS Online, uncomment and replace path with portal URL
//arcgisUtils.arcgisUrl = "http://pathto/portal/sharing/content/items";
arcgisUtils.createMap("7f975854312c4ca9a50aa5933c4a782e", "map").then(function (response) {
//update the app
dom.byId("title").innerHTML = response.itemInfo.item.title;
dom.byId("subtitle").innerHTML = response.itemInfo.item.snippet;
var map = response.map;
//// adding in the markers
//var jsonString = { locations: [{ latitude: 51.6220455, longitude: 4.54404212, textToDisplayOnThePictureMarkerSymbol: 34 }, { latitude: 51.8838877, longitude: 4.7527823578, textToDisplayOnThePictureMarkerSymbol: 50 }] };
//jsonString = jsonString.locations;
//picSymbol = new PictureMarkerSymbol('http://static.arcgis.com/images/Symbols/Shapes/BluePin1LargeB.png', 60, 60);
//map.on("ready", function (evt) {
// for (var i = 0; i < jsonString.length; i++) {
// var geometryPoint = new Point(jsonString[i].longitude, jsonString[i].latitude, new SpatialReference(4326));
// textSymbol = new TextSymbol(jsonString[i].textToDisplayOnThePictureMarkerSymbol).setOffset(0, -4);
// map.graphics.add(new Graphic(geometryPoint, picSymbol));
// map.graphics.add(new Graphic(geometryPoint, textSymbol));
// }
//});
//// end marker codes
//add the scalebar
var scalebar = new Scalebar({
map: map,
scalebarUnit: "english"
});
// location button
geoLocate = new LocateButton({
map: map
}, "LocateButton");
geoLocate.startup();
//add the legend. Note that we use the utility method getLegendLayers to get
//the layers to display in the legend from the createMap response.
var legendLayers = arcgisUtils.getLegendLayers(response);
var legendDijit = new Legend({
map: map,
layerInfos: legendLayers
}, "legend");
legendDijit.startup();
});
});
});
</script>
如果您注意到被注释掉的区域，我曾尝试在我的 map 上添加标记，但由于某些奇怪的原因它们没有显示。是否存在导致这种情况或任何其他因素的 map 类型差异？还是我必须添加一个新层？我对所有这些和 javascript 都很陌生，所以我不确定序列将如何影响代码——我只知道 require 脚本和函数必须在相同的序列中。请帮忙!
最佳答案
你那里的东西有几个问题。我用你的代码的一个工作示例创建了一个 jsfiddle:http://jsfiddle.net/j84bqy4v/ 以下是我所做的主要更改:
- 基本上您不需要很多您正在做的事情，所以我删除了诸如 dojo/ready、加载 map 等内容。
- Map on load 是一个好用的东西，但我认为它没有触发，因为在 createMap 函数返回时 map 已经加载。
- 你的纬度/经度值也倒退了，而且它们也不在你的 map 中心附近，所以一旦我正确添加它们，它们就会出现在欧洲附近的某个地方，而不是 map 中心的新加坡。我在 map 的可见范围内放入了一些不同的任意点。
- 此外，您的 jsonString 不是 json 字符串，而是一个 javascript 对象。我将其简化为一个对象数组。
代码如下:
Javascript
require([
"dojo/parser",
"dijit/layout/BorderContainer",
"dijit/layout/ContentPane",
"dojo/dom",
"esri/map",
"esri/graphic",
"esri/symbols/PictureMarkerSymbol",
"esri/symbols/TextSymbol",
"esri/geometry/Point",
"esri/SpatialReference",
"esri/tasks/ProjectParameters",
"esri/tasks/GeometryService",
"esri/urlUtils",
"esri/arcgis/utils",
"esri/dijit/Legend",
"esri/dijit/Scalebar",
"esri/dijit/LocateButton",
"esri/layers/FeatureLayer",
"dojo/on",
"dojo/domReady!"],
function (
parser, BorderContainer, ContentPane, dom, Map,
Graphic, PictureMarkerSymbol, TextSymbol, Point, SpatialReference, ProjectParameters, GeometryService,
urlUtils, arcgisUtils, Legend, Scalebar, LocateButton, FeatureLayer,
on) {
parser.parse();
//if accessing webmap from a portal outside of ArcGIS Online, uncomment and replace path with portal URL
//arcgisUtils.arcgisUrl = "http://pathto/portal/sharing/content/items";
arcgisUtils.createMap("7f975854312c4ca9a50aa5933c4a782e", "map").then(function (response) {
//update the app
dom.byId("title").innerHTML = response.itemInfo.item.title;
dom.byId("subtitle").innerHTML = response.itemInfo.item.snippet;
var map = response.map;
//// adding in the markers
var locations = [{
latitude: 1.382,
longitude: 103.949,
text: 34
}, {
latitude: 1.380,
longitude: 103.952,
text: 50
}];
var picSymbol = new PictureMarkerSymbol(
'http://static.arcgis.com/images/Symbols/Shapes/BluePin1LargeB.png', 60, 60);
for (var i = 0; i < locations.length; i++) {
var geometryPoint = new Point(locations[i].longitude, locations[i].latitude);
var textSymbol = new TextSymbol(locations[i].text).setOffset(0, -4);
map.graphics.add(new Graphic(geometryPoint, picSymbol));
map.graphics.add(new Graphic(geometryPoint, textSymbol));
}
//// end marker codes
//add the scalebar
var scalebar = new Scalebar({
map: map,
scalebarUnit: "english"
});
// location button
geoLocate = new LocateButton({
map: map
}, "LocateButton");
geoLocate.startup();
//add the legend. Note that we use the utility method getLegendLayers to get
//the layers to display in the legend from the createMap response.
var legendLayers = arcgisUtils.getLegendLayers(response);
var legendDijit = new Legend({
map: map,
layerInfos: legendLayers
}, "legend");
legendDijit.startup();
});
});
关于Javascript:将标记添加到自定义 esri web map ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31577697/