acrgis api for javaScript中的FeatureLayer查詢:

1. 用api查詢

<script>require(["dojo/dom", "dojo/on","esri/tasks/query", "esri/tasks/QueryTask", "dojo/domReady!" ], function (dom, on, Query, QueryTask) {//獲取選擇圖層中的所有要素 var layerUrl ="https://geoplat.cloud.com/arcgis/rest/services/Hosted/earthquake19911995/FeatureServer" var queryTask = new QueryTask(layerUrl);var query = new Query();//query.returnGeometry = false; //query.outFields = ["objectid","time_","latitude","longitude","depth","mag"]; query.outFields = ["*"];//query.distance=3000; //query.objectIds= //query.num = 500; //query.start = 1; query.where = "1 = 1";queryTask.executeForCount(query,function(count){ console.log(count); }, function(error){
console. log(error); });
var mm = queryTask. execute( query, showResults);
function showResults (results) { //返回的結果 console.log(results); }
</ script >
</ body >
</ html >


2.用ajax查詢：
<script type="text/javascript">function barAnalytize(){var url = 'https://geoplat.cloud.com/arcgis/rest/services/Hosted/earthquake19911995/FeatureServer/0/query'; $.ajax({type:"GET",url: url,data: {where:"1=1",outFields:"time_,latitude,longitude,depth,mag", f: "json" },dataType: 'json',success:function(data){alert(data.features[0].attributes.latitude);alert(data.features[0].attributes.mag);return data;},error:function(){alert(1);}}); </script>

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