Hi, I would like to use MapImageLayer and his method SubLayer to do a query; layerimage is a MapImageLayer, I extract sublayer using findSublayerById, next I done filter sublayer using a definitionExpression. But when I do a Query in this SubLayer dont work, nothing happen. After resolve promise of queryFeatures this result would be FeatureSet but nothing happen have not created object FeatureSet
What I can do?
Thanks for yours help
Andres,
Here is a modified sample that adds the query featureset results to the console.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<title>MapImageLayer - Set definition expressions on sublayers - 4.8</title>
<link rel="stylesheet" href="https://js.arcgis.com/4.8/esri/css/main.css">
<script src="https://js.arcgis.com/4.8/"></script>
<script>
require([
"esri/Map",
"esri/views/SceneView",
"esri/layers/MapImageLayer",
"dojo/on",
"dojo/number",
"dojo/domReady!"
],
function(
Map, SceneView, MapImageLayer, on, number
) {
/*****************************************************************
* Create a MapImageLayer instance pointing to a Map Service
* containing data about US Cities, Counties, States and Highways.
* Define sublayers with visibility for each layer in Map Service.
*****************************************************************/
var layer = new MapImageLayer({
url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer",
sublayers: [
{
id: 3,
visible: false
},
{
id: 2,
visible: true
},
{
id: 1,
visible: true
},
{
id: 0,
visible: true
}]
});
/*****************************************************************
* Add the layer to a map
*****************************************************************/
var map = new Map({
basemap: "dark-gray",
layers: [layer]
});
var view = new SceneView({
container: "viewDiv",
map: map,
zoom: 4,
center: [-99, 39]
});
/*****************************************************************
* Listen for events on when the slider values have changed.
* When the slider value changes, apply the new value to the
* MapImageLayer definitionExpression.
*****************************************************************/
layer.when(function() {
var cities = layer.findSublayerById(0);
var citiesQuery = cities.createQuery();
citiesQuery.where = "areaname LIKE 'A%'";
cities.queryFeatures(citiesQuery)
.then(function(response){
console.info(response.features);
});
});
});
</script>
<style>
html,
body {
font-family: sans-serif;
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
#viewDiv {
position: absolute;
right: 0;
left: 0;
top: 0;
bottom: 0;
}
</style>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
Thanks works very well
Great, don’t forget to mark this as answered.
//layer.findSublayerById(0);
This just saved me from hours of frustration today. I should always remember check the community first.